A family is seeking justice after a 22-year-old man from South Carolina living in a mental health facility was brutally murdered by another resident -- one they say "had every telltale sign of a budding serial killer.

Cantrell told police that he killed Jared and Deshea because his alternate personality, Robert Baldwin, had instructed him to do so,” according to the lawsuit.

The case against a South Carolina mental health facility where a man is accused of murdering and cannibalizing patients could be heading to trial.

Marc-Anthony Cantrell, who is charged with the gruesome murders of two men in a Columbia SC residential care home, was a Satan worshipper with devil’s horns tattoos who ate his victims’ ears, lawsuit says.

The family blames the facility for allowing what they describe as “a budding serial killer” to be placed in a home with vulnerable adults.