The judge held the accused Abdul Rahim Jamluddin Ali, guilty under Section 304 (1) of the Indian Penal Code and sentenced him to the jail term.
Prosecutor Buleshwar Hinge who appeared for the prosecution told the court that the accused and the deceased Arshal Anwar Khan, 21, had gone to Hyderabad.
On July 8, 2013, they went to Kalwa and stayed with a group of youths.
On the night of July 9, 2013, the accused attacked the deceased who was asleep with a hard and blunt object as well as strangulated him.
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Other room mates rushed the injured to a hospital where doctors declared him brought dead, the prosecution told the court.
The defence counsel submitted that the accused had become insane after he was lodged in jail.
The prosecutor who examined two doctors and the father of the accused disproved the pleading based on the evidence on record, an extra-judicial confession and other proof.