St. Petersburg, Fla.-(Newsradio 970 WFLA)-A mother is under arrest for the stabbing death of her four year-old son, according to police. Officers say it happened at the Jordan Park Apartments on 13th Avenue, South.

Police say 40 year-old Tasha Trotter went to see her son at his grandma's home. The grandmother has had custody of little Joseph Artis for most of his life. Family members say Trotter has mental issues.

Investigators say Trotter grabbed a kitchen knife and started stabbing Joseph.  The grandmother was unable to stop the attack, but a neighbor heard screams and called officers.

Police arrested Trotter as she was leaving the apartment with the wounded child.  The boy was pronounced dead later at Bayfront Medical Center.

Photo Credit 970 WFLA/K. Norman