Duncan Peder McKenzie Jr. (October 5, 1951 – May 10, 1995)[1] was convicted of the murder of a schoolteacher from Conrad, Montana named Lana Harding on January 21, 1974.

In 2021, DNA tests posthumously linked McKenzie to a separate sexual assault and murder of a 15-year-old girl in Idaho in 1973.

They had three children together, Richard, Michelle, and Jon and lived in Coeur d'Alene, Idaho at the time of his incarceration.

Harding was a schoolteacher in a small one-classroom schoolhouse and members of the community raised concerns of her well-being when she did not arrive at the school and her shoes were left in the driveway.

[10] His last meal was tenderloin steak, french fries, a tossed salad, orange sherbet and whole milk.

[13] In 2021, DNA tests linked McKenzie to the rape and murder of 15-year-old Debra Prety in Coeur d'Alene, Idaho in October 1973, days before Halloween.