Ramcharan Dwivedi's mother was arrested by Waliv police. Pic/Hanif Patel

Fed up of her drug addict son who was also sexually abusive, a mother in Bhayander West paid contract killers Rs 50,000 to murder him; now, he's dead, but she's in jail. The Vasai police on Sunday arrested the woman and three others for the murder that was committed on August 20.