Police in Bridgewater Township are investigating the stabbing of a couple believed to be at the hands of their own son. The violence went down at a home on Washington Valley Road late last night. NBC 4 New York is reporting the suspect's mother died at the scene. His father was rushed to the hospital but there is no word on his condition. The son, who is believed to have mental issues, is in custody after he reportedly barricaded himself inside the home. The Somerset County Prosecutor's Office is investigating.