Suspected Serial Killer Trucker Investigated in Unsolved Slayings

— -- Prosecutors are retracing the steps of a suspected serial killer, trying to uncover whether he’s possibly tied to additional unsolved slayings in the Midwest.

Trucker Robert Rembert Jr. was charged this week in connection to four killings over nearly 20 years.

A grand jury indicted Rembert, 45, Tuesday on 25 charges related to the Cleveland-area killings, including kidnapping, sexual assault and 10 aggravated murder counts, according to court documents obtained by ABC News.

Prosecutors on the case allege that Rembert is a serial killer who had not previously been charged in any of these four cases.

The killings date back to 1997, starting with the alleged sexual assault and slaying of Rena Mae Payne, 47.

Payne’s body was found at a bus station – Rembert was a bus driver then – and authorities located Rembert’s DNA at the crime scene, they say.

Rebecca Hall, 31, was sexually assaulted and killed in June of this year, again with DNA allegedly linked back to Rembert.

Authorities also say Rembert shot dead his cousin, Jerry Rembert, 52, as well as Morgan Neitzel, 26, both of whom Rembert was living with at the time.

Rembert hasn’t entered a plea. He remains in custody, held on $1 million bond.

If convicted, he could face the death penalty.

Rembert was previously convicted in 1997 for voluntary manslaughter in a man’s death, and served six years in prison.