By Steve Neavling
ticklethewire.com

The FBI is helping investigate whether a Cleveland truck driver linked to five killings was responsible for any other slayings, the Cleveland Dispatch reports.

Robert Rembert Jr., 45, who served prison time for a 1997 shooting death, has been charged with aggravated murder in the deaths of three people this year and one in 1997.

Rembert has been dubbed a “serial killer” by Cuyahoga County Prosecutor Tim McGinty, who said investigators are examining Rembert’s truck routes to determine if he was involved in any other slayings.

Rembert is accused of sexually assaulting and strangling to death two women in June. He’s also accused of fatally shooting two men in the head last month.