ATLANTA -- A suspect killed at an Alabama home – including a pregnant woman – then abducted his estranged girlfriend and her infant before he was taken into custody, Mobile County authorities said.

The suspect, Derrick Dearman, attacked the victims as they slept and then abducted the infant and the girlfriend, 24-year-old Laneta Lester, a sheriff’s captain said. They were both found alive. The infant is Lester’s child, reports CBS affiliate WKRG.

Derrick Dearman Facebook via WRKG-TV

Dearman, 27, of Leakesville, Mississippi, will be charged with six counts of capital murder, Mobile County sheriff’s spokeswoman Lori Myles said Sunday. Five counts stem from the killing of Shannon Melissa Randall, 35; Justin Kaleb Reed, 23; Joseph Adam Turner, 26; and Robert Lee Brown, also 26. The additional count is because 22-year-old Chelsea Marie Reed was 5 months pregnant, Myles said.

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The bodies were found Saturday afternoon inside the home in Citronelle, a small town 30 miles northwest of Mobile.

Though connections between Dearman and the five people killed were not immediately clear, investigators have determined that Lester had gone to the home on Aug. 19 to get away from an abusive relationship with Dearman, the sheriff’s office said in a statement. Lester was staying with a relative there.

The crime was of a magnitude rarely if ever seen in this corner of rural, southern Alabama, Mobile County sheriff’s Capt. Paul Burch said.

“It’s unprecedented here,” Burch told The Associated Press.

Burch told WKRG the victims had the kind of injuries that were a result of what experts term “overkill,” or excessive violence, and said there was a massive amount of blood at the crime scene.

Earlier Sunday, Burch told reporters that investigators expect to be at the scene for a couple days. “It’s obviously a horrific scene,” he said.

Mobile County District Attorney Ashley Rich told reporters near the scene that in her 20-year career as a prosecutor, she’s never encountered a crime “where there were five people who were brutally and viciously murdered, and that’s what we have here.”

She said “multiple weapons” were used. The weapons included a gun, reports CBS affiliate WKRG.

Dearman was taken into custody after he walked into the sheriff’s office in Greene County, Mississippi, about 20 miles west of Citronelle, Burch said. Dearman was accompanied by his father when he showed up at the sheriff’s department and surrendered Saturday afternoon, the Alabama sheriff’s office said in a statement.

Dearman has confessed to the crimes, Burch told the news site Al.com.

“He’s been cooperative,” Burch told the AP on Sunday.

Prosecutors have already begun the process of trying to extradite Dearman from Mississippi to Alabama, Burch said Sunday. The sheriff of Greene County, Stanley McLeod, could not be reached for comment Sunday.

Around 1 a.m. Saturday, someone inside the home called 911 and reported that Dearman was on the property, the statement said. Citronelle police came to the house, but Dearman had left before the officers arrived, sheriff’s officials said.

Later, sometime between 1:15 a.m. and daylight Saturday, Dearman returned to the home and attacked the victims while they were sleeping, the statement said. After the killings, Dearman forced Lester and the 3-month-old infant - the child of the one of the murder victims - into a vehicle at the home. The three drove to the Mississippi home of Dearman’s father.

After they arrived there, Dearman released Lester and the infant and then turned himself in at the Mississippi sheriff’s department, Burch said.

A grisly murder of five people allegedly took took place at this Citronelle, Alabama, home behind the tree line, on August 20, 2016, according to WRKG. WRKG

Dearman has some criminal history, including an active warrant for a burglary charge. Officials tell WKRG Dearman has a history of drug use, but don’t know whether he was on drugs at the time he allegedly committed the killings.

The killings happened about 150 miles southwest of Rutledge, Alabama, another south Alabama town where six family members were found shot to death at their rural home on Aug. 26, 2002.

In that case, Westley Devon Harris was given a death sentence after being convicted of slaughtering his girlfriend’s relatives. Prosecutors said he was angry because he thought they were trying to keep him away from her. After the killings, Harris fled with his girlfriend and child. The girlfriend, who was 16 at the time, ended up testifying against him.