State v. Clifford Old-Horn (Mont. 2014 MT 161)

Jailhouse informant case arising at Great Falls Regional Prison. Inmate Robert Gardner (serving 50 years for deliberate homicide) contacted Great Falls detectives after cellmate Old-Horn disclosed he had acted as a confidential informant and held info on the unsolved murder of Harold Mitchell, Jr. Old-Horn offered information through Gardner hoping Gardner would receive a sentence reduction. District Court suppressed Old-Horn's statements as involuntary (belief of immunity); Montana Supreme Court affirmed new trial and suppression.