A horrific incident of a son tying up his mother and slitting her throat for refusing to give him money to buy liquor has come to light in the Bagalkot district of Karnataka on Friday. The incident was reported from Tulasigeri in Bagalkot taluk. The accused has been identified as 28-year-old Venkatesh Girisagar, and the victim is his 58-year-old mother, Shavakka Girisagar.