Duncan McKenzie (murderer)

Duncan McKenzie
McKenzie in 1990
Born(1951-10-05)October 5, 1951
Chicago, Illinois, U.S.
DiedMay 10, 1995(1995-05-10) (aged 43)
Montana State Prison, Montana, U.S.
Criminal statusExecuted by lethal injection
ConvictionsDeliberate homicide
Aggravated kidnapping
Sexual intercourse without consent
Second degree assault
Criminal penaltyDeath (March 3, 1975)
Details
VictimsDebra Prety, 15
Lana Harding, 23
DateOctober 26, 1973
January 21, 1974
CountryUnited States
StatesIdaho and Montana

Duncan Peder McKenzie Jr. (October 5, 1951 – May 10, 1995) was convicted of the murder of a schoolteacher from Conrad, Montana named Lana Harding on January 21, 1974. After his conviction in March 1975, he spent 20 years on death row, receiving eight stays of execution. His ninth stay of execution was denied by the United States courts of appeals.

After exhausting all legal avenues, McKenzie was executed on May 10, 1995. He was the first person executed in Montana since 1943, and also the first ever U.S. death row inmate to spend twenty years or more on death row and still eventually be executed. He is one of only three people to have been executed in Montana since the reinstatement of the death penalty. McKenzie, who maintained his innocence to the end, was the only one of the three to be executed involuntarily.

In 2021, DNA tests posthumously linked McKenzie to a separate rape and murder of a 15-year-old girl in Idaho in 1973. The police publicized their findings in 2023. McKenzie had long been a suspect in the murder, but had refused to admit his guilt for any of his crimes and had rejected pleas from the girl's family to confess to her murder prior to his execution.