Introduction:

The Madhya Pradesh High Court has held that an inconclusive forensic voice examination report cannot, by itself, justify the acceptance of a closure report in a corruption case. Where the forensic laboratory is unable to express an opinion because the material submitted for comparison is insufficient or inappropriate, the investigating agency cannot treat the absence of a conclusive voice match as proof that no offence has been committed. The Court emphasised that further investigation may be necessary to obtain suitable evidence and properly examine allegations of illegal gratification.

A division bench comprising Justice Anand Pathak and Justice Deepak Khot dismissed a petition filed by a Police Assistant Sub-Inspector (ASI) challenging an order passed by the Special Judge under the Prevention of Corruption Act. The Special Judge had rejected the investigating agency’s closure report and directed further investigation, including the collection of an appropriate voice sample of the petitioner for fresh forensic examination.

The case originated from a complaint lodged by Karan Gurjar against his landlord, Syed Noman Hussain. Gurjar had alleged that Hussain vandalised the hotel premises rented out to him and wrongfully retained articles belonging to the hotel. Following the complaint, an FIR was registered against Hussain for the offence of cheating under Section 420 of the Indian Penal Code. The petitioner ASI was assigned to investigate that case.

During the course of the investigation, the complainant allegedly approached the authorities with a separate grievance: the ASI had demanded money from him in exchange for having investigated the matter and registered the FIR against his landlord. According to the prosecution, the ASI initially demanded ₹30,000 and subsequently asked the complainant to bring ₹10,000 as illegal gratification.

The complainant approached the Deputy Superintendent of Police, who provided him with a digital voice recorder to capture conversations relating to the alleged demand. The recorded conversation was subsequently handed over to the investigating agency, and a transcript was prepared. On the basis of the allegations and the recorded material, an FIR was registered against the ASI under Section 7 of the Prevention of Corruption Act, 1988.

Section 7 of the Prevention of Corruption Act deals with a public servant obtaining, accepting, or attempting to obtain an undue advantage in connection with the improper or dishonest performance of public duty. The provision is intended to address the abuse of public office for unlawful personal benefit. Accordingly, an allegation that a police officer demanded money from a complainant in connection with the performance of investigative duties raises a serious question under the anti-corruption framework.

However, after completing its investigation, the agency submitted a closure report. It maintained that the transcript did not disclose any direct or indirect demand for a bribe. The agency also relied on the Regional Forensic Science Laboratory (RFSL), Bhopal, report, which did not provide an opinion on whether the recorded voice matched the petitioner’s voice. The laboratory explained that the recording did not contain sufficient common words or suitable speech material to conduct a reliable comparison.

The Special Judge declined to accept the closure report. The court considered the transcript and the circumstances in which the recording had been made and found that the material warranted further investigation. It consequently directed the investigating agency to obtain an appropriate voice sample of the petitioner and submit it for fresh examination by the forensic laboratory.

The ASI challenged this direction before the High Court. His principal objections concerned the absence of evidence establishing a demand or acceptance of illegal gratification, the inconclusive forensic report, and the constitutional protection against compelled self-incrimination under Article 20(3). He also argued that directing him to provide a fresh voice sample would amount to an impermissible roving inquiry.

The High Court was therefore required to examine whether the Special Judge had acted within the scope of judicial authority while rejecting the closure report and ordering further investigation. It also had to consider whether the material collected during the investigation was sufficient to warrant continuation of the proceedings under the Prevention of Corruption Act.

Arguments of the Parties:

Petitioner’s Arguments:

The petitioner ASI, represented by Senior Advocate Anil Khare along with Advocate Priyank Agrawal, challenged the Special Judge’s order on the ground that the investigating agency had already examined the available material and concluded that no offence was made out. According to the petitioner, the closure report was supported by the transcript of the recorded conversation, which did not establish any demand for illegal gratification.

The petitioner contended that the prosecution had failed to demonstrate the essential ingredients of an offence under Section 7 of the Prevention of Corruption Act. Merely recording a conversation between the complainant and the petitioner could not establish that the latter had demanded or attempted to obtain an undue advantage. The petitioner maintained that the transcript did not contain any clear statement showing a demand for money in exchange for performing or improperly performing an official duty.

Another significant argument concerned the failure of the trap proceedings. The petitioner submitted that neither he nor any amount allegedly offered as illegal gratification was secured during the proceedings. According to him, the absence of any recovery or successful trap further weakened the prosecution’s case and demonstrated that the allegations were not supported by sufficient evidence.

The petitioner also relied on the RFSL report, which had failed to establish a match between the recorded conversation and his voice. He argued that, in the absence of a conclusive forensic opinion, the prosecution could not reasonably attribute the recorded conversation to him. The petitioner sought to rely on the inconclusive nature of the forensic evidence as a reason for treating the closure report as justified.

Further, the petitioner objected to the direction requiring him to provide a fresh voice sample. He argued that such a direction would effectively compel him to participate in an investigative exercise intended to strengthen the prosecution’s case. According to him, the direction amounted to a roving inquiry rather than a legitimate attempt to investigate an existing allegation.

The petitioner specifically invoked Article 20(3) of the Constitution of India, which protects an accused person against being compelled to be a witness against himself. He contended that directing the collection of his voice sample would violate this constitutional safeguard. On these grounds, he sought the setting aside of the Special Judge’s order directing further investigation and the collection of a fresh voice sample.

State’s Arguments:

The State, represented by Advocate Abhinav Shrivastav, opposed the petition and defended the Special Judge’s decision to reject the closure report. It submitted that an investigating agency’s conclusion is not binding on the court and that the judicial authority considering a closure report must independently examine the material collected during the investigation.

The State argued that the Special Judge was entitled to direct further investigation where the available material indicated that the investigation was incomplete or that relevant evidence had not been properly collected. The mere submission of a closure report could not prevent the court from exercising its authority to ensure that the allegations were investigated adequately.

According to the State, the recorded conversation prima facie indicated a demand for an undue advantage. The transcript had been considered by the Deputy Superintendent of Police, who found that the alleged demand disclosed an offence under Section 7 of the Prevention of Corruption Act. The State maintained that this material could not simply be disregarded at the investigation stage.

The State also addressed the forensic report, pointing out that the laboratory had not declared that the recorded voice did not belong to the petitioner. Rather, it had expressed its inability to provide an opinion because the sample submitted for examination was unsuitable and insufficient for comparison. The absence of a conclusion, therefore, could not be treated as a finding in favour of the petitioner.

On the question of obtaining a fresh voice sample, the State argued that such a direction was a legitimate investigative step intended to address the shortcomings in the earlier forensic examination. It further submitted that obtaining a voice sample did not violate Article 20(3) of the Constitution and could not be equated with compelling an accused person to give testimonial evidence against himself.

The State accordingly urged the High Court not to interfere with the Special Judge’s order, which had been passed after considering the available evidence and identifying the need for further investigation.

Court’s Judgment:

The division bench examined the rival submissions and identified two principal questions for consideration. First, whether the Special Judge under the Prevention of Corruption Act had committed any illegality, irregularity, or jurisdictional error by rejecting the closure report and directing further investigation, including the collection of an appropriate voice sample of the petitioner. Second, whether the material placed before the Special Judge was insufficient to disclose an offence under the Prevention of Corruption Act.

After examining the record, the High Court found no reason to interfere with the order directing further investigation. It observed that the Special Judge had not acted arbitrarily or without considering the material collected by the investigating agency. Rather, the court had examined the transcript and the circumstances surrounding the alleged demand and concluded that the matter required further scrutiny.

The bench particularly considered the fact that the FIR under the Prevention of Corruption Act had been registered on the basis of the recorded conversation. The Special Judge had noted that the Deputy Superintendent of Police, after listening to the transcript, had formed the view that the alleged demand itself disclosed an offence under Section 7 of the Act. The Special Judge had consequently found that the material raised a prima facie case which could not be discarded at the investigation stage.

The High Court agreed that the petitioner’s contention that no offence was disclosed by the investigation was not a sufficient ground to terminate the proceedings. It observed that the material available on record had to be considered in its entirety and that the transcript could not be ignored merely because the investigating agency had subsequently recommended closure of the case.

The bench expressly held:

“Therefore, the ground that no offence is made out from the evidence and investigation conducted by the respondent agency is not found to be a sound ground to quash the entire investigation or the FIR”.

An important aspect of the judgment concerned the interpretation of the RFSL report. The investigating agency had relied on the report to support its decision to submit a closure report. However, the High Court closely examined the actual findings recorded by the forensic laboratory and found that the report did not establish that the petitioner’s voice was different from the voice contained in the recording.

Instead, the laboratory had expressed its inability to give an opinion because the material submitted for comparison was inappropriate and insufficient. The recorded conversation did not contain adequate common words, phrases, or suitable speech material to enable a reliable comparison between the questioned voice and the sample voice.

The bench observed that the report also referred to considerable intra-speaker variation and indicated that the petitioner appeared to have made a deliberate attempt to disguise his voice. In view of the inappropriate data and the absence of suitable speech material, the laboratory had concluded that no opinion could be given.

The Court explained that such a report could not be treated as conclusive evidence against the prosecution. There is a material difference between a forensic examination that establishes that two voices do not match and an examination in which the laboratory is unable to express any opinion because the samples are unsuitable. The latter does not resolve the question of identity and cannot automatically be interpreted as evidence exonerating the accused.

The bench observed:

“From perusal of the FSL report filed in the reference tab of the ERP, this court is of the considered opinion that the sample which was sent to the FSL was inappropriate and insufficient to form an opinion. Therefore, closure report on the basis of such inconclusive evidence does not lead to the conclusion that on the basis of collected evidence no offence is made out”.

This finding formed the central basis of the High Court’s decision. The Court made it clear that an investigating agency cannot rely on an inconclusive forensic report as though it were a positive finding in favour of the accused. Where the laboratory has been unable to reach a conclusion because the material supplied was inadequate, the appropriate course may be to obtain a suitable sample and undertake a fresh examination.

The judgment also addressed the authority of a Magistrate or competent court to reject a closure report and direct further investigation. Referring to the Supreme Court’s decision in Ramswaroop Soni v. State of Madhya Pradesh, along with other relevant decisions, the bench reiterated that a Magistrate is not bound to accept the investigating agency’s conclusion merely because a closure report has been submitted.

The judicial authority is required to apply its mind to the material collected during the investigation. If the investigation appears faulty, incomplete, or deficient in relevant evidence, the Magistrate is empowered to direct further investigation. This power ensures that the decision whether a criminal case should proceed is not left entirely to the investigating agency.

A closure report represents the investigating agency’s assessment of the evidence and its conclusion that prosecution is not warranted. However, that conclusion does not automatically determine the fate of the case. The court considering the report must independently examine whether the material justifies accepting the agency’s recommendation or whether additional investigation is necessary.

The power to direct further investigation is particularly relevant where an important evidentiary aspect remains unresolved. In the present case, the forensic laboratory had not ruled out the possibility that the recorded voice belonged to the petitioner. It had simply stated that the available material was inadequate to provide an opinion. The Special Judge was therefore justified in directing the investigating agency to collect a more appropriate voice sample and obtain a fresh forensic assessment.

The High Court also considered the petitioner’s objection that the direction for voice sampling violated Article 20(3) of the Constitution. This provision protects an accused person against being compelled to be a witness against himself. The constitutional protection is directed against compelled testimonial self-incrimination and must be distinguished from the collection of physical or identifying evidence through legally permissible investigative procedures.

The petitioner’s objection was considered in the context of the nature of the direction passed by the Special Judge. The direction was intended to obtain suitable material for forensic comparison because the earlier sample had not enabled the laboratory to reach a conclusion. The Court did not find that the Special Judge had exceeded jurisdiction by directing this further investigative step.

The bench’s decision is significant because it recognises that the quality and suitability of forensic material are essential to the reliability of scientific examination. A laboratory’s inability to express an opinion cannot be converted into a finding that the allegation is false. Equally, an inconclusive report cannot independently establish the guilt of an accused. Its proper legal significance is that the relevant evidentiary question remains unresolved and may require further investigation.

The Court’s approach also reflects the distinction between the investigation stage and the stage at which guilt is finally determined. At the investigation stage, the court is not required to decide whether the prosecution will ultimately prove the charge beyond reasonable doubt. The immediate question is whether the material available discloses sufficient grounds to continue the investigation or whether further evidence should be collected. The Special Judge had found that the transcript and the surrounding circumstances justified further inquiry.

Importantly, the High Court did not hold that the petitioner was guilty of demanding or attempting to obtain a bribe. Nor did it treat the recorded conversation or the inconclusive forensic report as conclusive proof of the allegation. Its decision was confined to the legality of the order rejecting the closure report and directing further investigation.

The bench ultimately concluded that the Special Judge had committed no illegality, irregularity, or jurisdictional error in declining to accept the closure report and directing the collection of an appropriate voice sample for fresh examination. It found that the order was a permissible exercise of judicial authority in view of the deficiencies in the earlier investigation.

Accordingly, the Madhya Pradesh High Court dismissed the ASI’s petition and allowed the direction for further investigation to remain in force.

The ruling underscores an important principle in corruption investigations: an inconclusive forensic report cannot be treated as an automatic basis for closing a criminal case. Where the available evidence raises a prima facie question and the forensic examination remains inconclusive because of inadequate material, the court may direct further investigation to ensure that the relevant evidence is properly examined. At the same time, the decision does not prejudge the accused’s guilt, which must ultimately be determined in accordance with law and on the basis of legally admissible evidence.