23-year-old Katherine Farrell was found stabbed to death at her parent's home in Saint James Monday morning.
Police believe she was killed by her ex-boyfriend James Schultz who later killed himself.
Schultz apparently picked up his 13-month-old son from Farrell, who is the boy's mother, brought him to his East Northport home, and then shot himself.
Police found the toddler in another room.
Get Eyewitness News Delivered