ATLANTA — The five people slain in a massacre at a south Alabama home included a woman who was five months pregnant, Mobile County authorities said.

The suspect, Derrick Dearman, attacked them as they slept and then abducted his estranged girlfriend, Laneta Lester, and an infant from the home, a sheriff's captain said. Both of them were found alive.

Dearman, 27, of Leakesville, Miss., will be charged with six counts of capital murder, Mobile County sheriff's spokesman 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.

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

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.

Earlier Sunday, Burch told reporters that investigators expect to be at the scene for a couple of 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.

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.