OAK PARK, Mich. -- Investigators are hoping DNA evidence from another case will hold clues to the 1976 slayings of four children in Oakland County.

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Hear What Prosecutor Says About New Clues

The investigation began when Michigan State Police detectives reopened a cold-case file on the 1972 homicides of two Bay County teenagers whose bodies were left in ditches, Local 4 reported. Officers flew to Texas Tuesday to interview a suspect in the case, Todd Warzecha (pictured, left), and take DNA samples, according to the report.

Once in Texas, officers found the 53-year-old man hanging from the ceiling of a storage shed in an apparent suicide, Local 4 reported.

Gorcyca said the suicide could be "compelling evidence" in regards to the killings of four children in Oakland County in 1976.

"He was a target and a suspect for a long period of time," said Oakland County Prosecutor David Gorcyca.

Warzecha was previously questioned about the deaths of the four children, whose bodies were also left along a roadside, Local 4 reported. The victims include Timothy King, 11, who was kidnapped on March 16, 1977, outside a Birmingham pharmacy; Mark Stebbins, 12, who was abducted while walking to his Ferndale home in February of 1976; Jill Robinson, 12, of Royal Oak, who disappeared on Dec. 22, 1976; and Kristin Mihelich, 10, who was abducted 11 days later from a convenience store in Berkley, according to Local 4 reports.

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IMAGE GALLERY: Oakland County Child Killer Investigation
ARCHIVE VIDEO: See Rescue 4 Undercover Report On Oakland County Case
TIPS: Do you have information that may lead to an arrest? Call authorities at (248) 584-5755.

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Investigators are now taking DNA samples from Warzecha's body to determine if there is a match in the Oakland County homicides.

"The Oakland County child killings is probably one of the biggest unsolved mysteries in Oakland County besides (Jimmy) Hoffa," said Gorcyca.

Gorcyca said if there is not a match, it could still help the case.

"We can take him off the list as a potential suspect," said Gorcyca.

Investigators are expecting tests on Warzecha's DNA samples to take several months for results.

No further details were released on the Bay County slayings.