Jenelle Evans ' son, Jace , recently checked into a mental health hospital following a 911 call about a disturbed teen at his grandmother's home ... TMZ has learned. Sources familiar with the situation tell TMZ ... Jace is now receiving treatment at a mental health facility after a troubling incident late last month. We're told there was a call to service at Barbara Evans ' home in North Carolina on February 22 for what authorities described as a "troubled teen disturbance." According to a