NASHVILLE, Tenn. — Tazewell County native Travis Reinking is mentally unstable and unable to stand trial, prosecutors said Tuesday.

The lawyers prosecuting Reinking, who stands accused of shooting four people to death in a Nashville-area Waffle House in April, filed motions in court asking the court to make a determination in the case, according to The Tennessean.

They're asking the court to decide whether Reinking needs more treatment before his case moves forward.

The deputy district attorney said in the motion that an Aug. 9 assessment by medical experts labeled his condition "such that he is currently not competent to stand trial and in need of immediate judicial hospitalization."

The case next has an Aug. 22 hearing. If the judge agrees, Reinking likely would remain in custody and receive treatment to stabilize his mental condition with an eye toward a future trial if he can be deemed competent.

Reinking, 29, is facing multiple charges, including four counts of criminal homicide and four counts of attempted criminal homicide in the April 22 incident that spurred a daylong manhunt before he was caught. He remains in custody without bond.

Akilah DaSilva, DeEbony Groves, Joe Perez and Taurean Sanderlin, all Nashville-area residents, were killed in the shooting.

The month after the incident he reportedly called into a Tennessee television station to state his intent to represent himself

Reinking's father, Jeff, who lives in rural Tazewell County, has meanwhile been sued by relatives of shooting victims, who argue that he bears some responsibility for the incident, having allegedly returned some of his son's firearms to him after the younger Reinking's Illinois firearms permit was revoked.

That suit seeks more than $50,000 in damages. A lawsuit in Tazewell County next has a hearing scheduled in October.