Todd Warzecha, 53, committed suicide last week in Texas instead of surrendering a sample of his DNA.
He was a prime suspect in two unsolved Mid-Michigan murders, and the investigator in the case says he should be a considered a suspect in other killings.
Michigan State Police Det. Robert Lesneski says it's never happened to him before. Never has someone killed himself just before the detective was to ask for a DNA sample.
"I think it's an interpretation, but that's my interpretation without a doubt," he said.
And that interpretation is that Warzecha had something to hide, and that's why he hung himself in an Austin, Texas, storage shed last week.
Warzecha was a suspect in the 1972 murders of Bay County teenagers Norbert Peck and Oscar Garcia.
"I believe he knew I was there," Lesneski said. "He knew what I wanted, and I think he, forgive me for saying this, like I said I feel bad for the family, I think it's something he didn't want to face."
The 1969 Bay City Handy graduate was on the radar screen of a lot of law-enforcement officers in Mid Michigan.
Never charged in the Peck and Garcia murders, he had served two years in a prison for an attempted adduction and sexual assault against another Bay County resident.
Police say sometime after Warzecha got out of prison, he tried to pick up a hitchhiker in Ogemaw County along I-75.
He opened his car door, but as the man hitchhiking was getting in the car, the vehicle was rear-ended. The hitchhiker lost a leg in the accident, but investigators say the accident may have saved his life.
Lesneski says Warzecha was also questioned in the 1976-1977 Oakland County child killings.
Four children were murdered, their bodies dumped along roads much like Peck and Garcia, and Lesneski has been in touch with the lead investigator on those cold cases.
"I'm assuming (the lead investigator) is going to do the same thing, taking a closer look at Mr. Warzecha," Lesneski said.
Investigators in a number of states are also digging through their cold case files to see if Warzecha could be considered a suspect.