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Iowa investigators say DNA links 1984 triple homicide to convict executed by Missouri in 1997

Investigators have linked a 1984 triple homicide in southeastern Iowa to a man who was later executed for the murder of a 12-year-old girl.

The Iowa Division of Criminal Investigation announced Friday that new DNA evidence implicates Andrew Six in the bludgeoning deaths of 20-year-old Justin Hook Jr., Hook's fiancee, 19-year-old Tina Lade, and Hook's mother, 41-year-old Sara Link.

Missouri authorities executed Six by lethal injection in 1997 for the 1987 kidnapping and murder of 12-year-old Kathy Allen. Six and his uncle kidnapped the girl from the Allen family's trailer in Ottumwa, slit her throat and dumped her body in northern Missouri.

Retired DCI supervisor Sam Swaim says Six was always a suspect in the earlier triple homicide but investigators did not have enough evidence to charge him.