BEAUFORT, South Carolina (Michigan News Source) – A suspect recently jailed for a 1988 murder in Three Rivers was found dead in his cell.

Three Rivers police said on Facebook that Robert Waters was found dead in his jail cell at Beaufort County Detention Center. Police arrested the 53-year-old Waters earlier this week in Beaufort, South Carolina in the 1988 killing of Cathy Sue Swartz. The 19-year-old was beaten, stabbed, and strangled in her apartment in Three Rivers.

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Waters was formally charged with open murder and he waived extradition to Michigan.

According to police, the South Carolina Law Enforcement Division was asked to do an in-custody death investigation.

It is unknown how Waters died and police said it is an ongoing investigation.