The Bristol County District Attorney's Office confirms the 25-year-old woman was found unresponsive in her bed by her father at about 5 p.m. on Sunday.
A 35-year-old New Bedford man who stabbed his former roommate was sentenced to serve eight to 12 years in state prison last week in Fall River Superior Court.
Prosecutors say the issue of self-defense is being looked into as part of the investigation into a fatal shooting in New Bedford's North End on Friday.