Shirajul, a resident of Barasat, was arrested on the basis of the complaint lodged with a local police station, sources said.
He was arrested in an overnight raid in the town here.
Bikash Mullick, a 65-year-old homoeopath doctor, was beaten to death yesterday by Shirjul and his associate Jalan when the doctor protested their lewd comments.
Jalan was arrested yesterday but Shirajul was absconding.
