India, April 9 -- A Delhi police officer, arrested last month in a bribery case, allegedly attempted to disguise his voice by altering it when a team of the Central Bureau of Investigation (CBI) visited him in a Mumbai jail to record a sample of his voice.

The CBI's Mumbai unit recorded the voice sample of the accused, police sub-inspector Rahul Malik, after taking the permission of a special court to visit him in jail, where he is lodged under judicial custody. The CBI will seek legal opinion on the next steps on this aspect of the probe, according to agency sources.

Malik, whose bail plea was rejected on Monday, had refused to provide a voice sample earlier, during custodial interrogation, according to the CBI.

While opposing his bai...