Authorities announced Tuesday that they have concluded that a man who committed suicide in January after he fell under suspicion in Cold Spring police officer Tom Decker's death was Decker's killer.
But they don't know why.
The 31-year-old police officer was ambushed with a shotgun as he responded to a call on the night of Nov. 29, 2012, and left to die behind a downtown Cold Spring bar. By saying that Eric Thomes would have been arrested in Decker's slaying had he lived, authorities wrapped up the active portion of an eight-month investigation.
But "what was the motive, and did the shooter act alone?" Stearns County Sheriff John Sanner said Tuesday. "Those are the questions still hanging out there that we would like to get the answers to ourselves."
Those unanswered questions explain in part why it took investigators the better part of a year to finally name Thomes — long considered a "person of interest" — a suspect in Decker's killing.
Tuesday's announcement by the Minnesota Bureau of Criminal Apprehension also for the first time cleared the name of Ryan Michael Larson, 34, who was arrested and jailed for five days, but never charged in Decker's death. The BCA has now handed over its duties to the Sheriff's Office.
Cold Spring Mayor Doug Schmitz said the latest developments will offer some limited relief to the central Minnesota town of 4,000.
"I think it's going to bring some closure to some people," he said. "The evidence was leaning so that they would have made an arrest with Thomes."