MEMPHIS, Tenn. — Larry Pickens, the man accused of killing Dr. Benjamin Mauck in a Collierville clinic Tuesday, had previous run-ins with Memphis Police including an attempted murder charge, records show.

Authorities say he was able to legally purchase the gun allegedly used to kill Mauck just eight days before the shooting.

In a domestic violence assault report from 2016, responding officers say Pickens stabbed his stepfather with a kitchen knife during a violent argument in Memphis. The victim was taken to a hospital in critical condition.

That incident resulted in Pickens’ arrest on a charge of attempted first-degree murder, according to police records.

In another domestic violence assault call from 2014, Memphis police said an argument with his mother over a dirty kitchen escalated, with Pickens allegedly grabbing a utensil for protection, as another man fired a gun into the floor as a warning.

Pickens is listed as a victim, but also was arrested by police in that incident.

While there are police reports from both incidents, they do not show up on Pickens’ record in a Shelby County criminal court database. No records were found indicating a conviction.

Pickens, 29, was captured by police Tuesday outside Campbell Clinic in Collierville following Mauck’s fatal shooting. He is charged with first-degree murder and aggravated assault. Bond was set at $1.2 million.

Pickens made his first court appearance in the case Thursday.

The shooting happened in an exam room at Campbell Clinic where Mauck, an orthopedic surgeon, was treating Pickens. He was shot three times, reports state. The motive is unclear.

Germantown Police released records showing that Pickens had been barred from a different location of Campbell Clinic because of unusual behavior just a few days prior to the Collierville shooting.

Pickens had called Memphis Police several times over the years, in one case telling officers that he was diagnosed with schizophrenia and had been off his medication.

But Collierville Police Chief Dale Lane said that his department had no prior contact with Pickens, and no reports of trouble at the clinic site.

“We’ve never had any contact with him prior to him the other day. No complaints,” Lane said.

Pickens bought the gun used in Tuesday’s shooting on July 3, the chief said.

“He purchased it on July the third and there was nothing that prevented him from making that purchase at the time,” Lane said. “It appears it was a legal purchase.”

WREG went by the home where the alleged stabbing occurred in 2016. No one answered the door there or at neighboring houses Friday.