Dillon, 23, claims that he has as many as 20 different personalities that can come out at any time.

“Since I was a kid, I’ve always heard voices and distinct ones. I didn’t tell people because I didn’t think they would understand or I thought that they would be scared of me,” says Dillon, who describes what it’s like living with what he says are multiple personalities on Wednesday’s episode of Dr. Phil.

WATCH: Why This Mom Says She Made A “Suicide Pact” With Son 

However, Dillon’s sister, Stephanie, questions Dillon’s claims and says she believes her brother is making up his behavior to manipulate their mother to get what he wants. “I think that the personalities are a scapegoat for all of the bad behaviors, so whatever he does, he can justify it,” she says.

To help this family determine whether drug use may be a contributing factor to Dillon’s behavior, Dillon agrees to take a drug test. Watch the results in the video above.

This episode of Dr. Phil airs Wednesday. Watch more here.