Quinton Lee Capers (copy)

Quinton Lee Capers. Provided

Charleston police said a man used concrete and a screwdriver to "brutally" bludgeon and stab a fellow homeless person to death earlier this month under the overpass where they had been sleeping.

Court documents released Wednesday revealed details that led to the arrest of 25-year-old Quinton Lee Capers on a murder charge.

Also on Wednesday, the victim was publicly identified as Larry Thompson, 63, of Myrtle Beach, whose girlfriend had reported him missing after the slaying.

Investigators from the Charleston Police Department laid out the circumstances of the killing in an arrest affidavit:

Thompson and Capers were staying under Interstate 26 near 314 King St., often eating at the Hot Dog Ministry, a homeless mission run by East Cooper Baptist Church that meets every Tuesday in the same area.

On Halloween, a Tuesday, Capers ate there but appeared to be agitated.

"I just feel like I could beat a (expletive) to death!" he said, a witness told the police.

The next day, Nov. 1, Capers was captured in surveillance footage at a nearby store. He was carrying a black backpack, wearing blue jeans and didn't appear to be injured.

Thompson was seen buying things in the same video.

At some point that night or early the next day, Capers got into a struggle with Thompson, police said.

A body was found early Nov. 2. Thompson's head had been badly beaten and stabbed with what appeared to have been a Phillips screwdriver. A large piece of bloodied concrete sat nearby.

Detectives canvassed the area and found a woman who said Thompson, her boyfriend, had gone missing. Others said Thompson and Capers had been seen together.

Days would pass, though, before investigators confirmed the victim's identity.

Then on Nov. 9, they encountered Capers at Medical University Hospital. He had suffered a broken foot, he told the police, after a piece of concrete fell on it.

He acknowledged sleeping under the overpass and knew about the "incident" there, he told the officers, but he didn't want to talk about it.

When they searched his belongings at the hospital, the police found what they thought to be blood on his blue jeans and on a screwdriver tucked into a black backpack.

Reach Andrew Knapp at 843-937-5414. Follow him on Twitter @offlede.

Andrew Knapp is editor of the Quick Response Team, which covers crime, courts and breaking news. He previously worked as a reporter and copy editor at Florida Today, Newsday and Bangor (Maine) Daily News. He enjoys golf, weather and fatherhood.