The next day, three boys hiking along the Sun River in Great Falls found Mr Bogle’s body in an area known as a rendezvous for teenagers.
His mouth was down and shot in the back of the head. His hands were tied behind his back to his own belt. The ignition switch, radio and headlights on his car were on and the car was in gear. His expensive camera was not taken.
Investigators initially suspected that Ms Kalitzke had been kidnapped.
But the next day, January 4, 1956, a county road worker found his body from a gravel road about five miles north of Great Falls. Sergeant Kadner said he had been shot in the head and suffered injuries that were consistent with conflict or sexual assault.
Newspaper headlines described the teenagers as “lovers street murder victims” and recalled the “extensive search” for a “brutal killer”.
Over the next half century, detectives investigated about 35 potential suspects, including James (Whitey) Bulger, the infamous South Boston mobster who was convicted in 2013 of participating in 11 murders. Mr Bulger, who died in 2018, lived in Great Falls in the 1950s and was arrested there in 1951 for a rape, Sergeant Kadner said.
But no one was ever charged and the matter went cold.
Investigators turned to genetic pedigrees in 2018, when authorities arrested Joseph James DeAngelo, known as the Golden State Killer, and charged him with the 13 murders and nearly 50 rapes that terrorized California in the 1970s and ’80s. accused of doing This was the first high-profile case to be cracked along a genetic pedigree.
“That’s when we really started looking at what evidence we had, and if we could potentially do the same thing,” said Sergeant Kadner.
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