What happened
Michael Silka killed multiple people around Manley Hot Springs in 1984 and concealed victims in or near the Tanana River before authorities closed in.
The investigation
The investigation grew from missing-person reports and witness information into an armed search involving Alaska law enforcement.
What the courts or investigators concluded
Silka killed an Alaska State Trooper during the confrontation and was then shot dead by police, so the case never went to trial.
Why the case remains significant
The killings remain one of Alaska’s darkest spree-crime episodes and show the logistical challenges of investigating violent crime across remote communities and enormous distances.
Case context
Crime by Region organizes cases geographically so readers can move from one file to other investigations from the same country. For unresolved or contested cases, the wording above reflects the distinction between confirmed events, investigative theories and findings actually established in court.