The Sanger man who fatally stabbed his grandparents Saturday before killing himself was being treated for a mental illness, his mother says.
Ryan D. McGraw, 26, had lived with the victims — Douglas Preston Greeney, 71, and Gladys Gail Greeney, 66 — in the home in the 2500 block of Wichita Trail in Sanger, according to authorities.
Lt. Orlando Hinojosa with the Denton County Sheriff's Office said Sanger police and Denton sheriff's deputies went to the home about 9:45 p.m. Saturday after a relative found the bodies.
Krystie McGraw wrote in a public Facebook post that her son had struggled daily with "severe mental illness" and that her parents had insisted on taking care of him.
She said Ryan McGraw loved his grandparents.
"He was under a doctor's care who just changed his medication," Krystie McGraw wrote. "Unfortunately, our society does not provide adequate treatment or resources to help people who struggle and to prevent tragedies like this."
Krystie McGraw couldn't be reached for comment.
Two years ago, Ryan McGraw was accused of beating a roommate at a Dallas recovery home called Soul's Harbor, court records show. The domestic violence charge against him was tossed after he completed a battering prevention program.
McGraw's roommate told police in March 2015 that he had repeatedly asked McGraw to stop singing along to music that was playing from a computer. McGraw was sitting at the computer with headphones on.
The roommate pressed the computer's reset button, which prompted McGraw to jump out of his seat and strike the roommate, according to an arrest warrant affidavit. McGraw got in an argument with his roommate and punched him four to five times in the back of the head as the roommate tried to move away, police said.
When two officers questioned McGraw about the fight, he admitted to hitting his roommate, according to the affidavit.
"It was the wrong day to [expletive] with me," McGraw reportedly told police.
McGraw was a few days shy of his 20th birthday when he was arrested in 2011 on a charge of marijuana possession. He pleaded no contest in a Denton County court and was given probation, records show.
National Suicide Prevention Lifeline: 1-800-273-8255. Confidential online chat is also available at www.suicidepreventionlifeline.org.
The Dallas Morning News staff writer Tom Steele contributed to this report.