The apparent serial murders became known for how all the women were found "packaged" up
The slayings of four women remained unsolved for over three decades until Missouri police finally caught a break in the case.
The DNA of a 73-year-old man, Gary Muehlberg, already serving a life sentence for murder was found to match evidence from a 32--year-old crime scene, investigators from O'Fallon Police Department announced on Monday.
Det. Sgt. Jodi Weber said Muehlberg confessed to the murders of Robyn Mihan, Brenda Pruitt, Donna Reitmeyer, and Sandra Little.
The slayings occurred between 1990 and 1991 -- with the bodies being discovered in St. Louis, Lincoln and St. Charles counties.
All the victims were mothers. Their bodies were all treated in a similar manner by the killer -- strangled, faces covered, and gagged, per St. Louis Post-Dispatch.
The way in which the bodies were displayed soon became known as the "Package Killer" murders.
Muehlberg is currently serving a life sentence for an unrelated murder, the 1993 killing of Kenneth "Doc" Atchison, who was found in a plywood box in his basement. The murder was reportedly over $6,000.