Chennai, Aug. 11 -- A 30-year-old man was arrested on Sunday for the alleged murder of his 19-year-old brother in Chennai, police said.

The man was arrested despite his mother confessing earlier to have committed the murder, they added.

The victim, identified as R Mugil, was killed on Saturday, after allegedly threatening his 57-year-old mother, identified as R Pramila, with a knife, police said.

The following day, Pramila surrendered the knife at Vadapalani police station and confessed to having killed her son, they added.

However, forensic experts said that the multiple deep injuries to the body of the deceased suggested that the crime could not be attributed to a 57-year-old woman, police said.

Police also recovered CCTV footage t...