Two days later, investigators found evidence of Mr Lakey's murder.
"Human remains and bits of clothing were found in Bayley's garden, bloodstains were found on his sledge and guns missing from the Lakey home were located in a swamp on Bayley's farm.
"This and other evidence helped establish the murderer had shot Samuel Lakey and burned his body in a drum. Bayley was convicted for the double murder and hanged at Mt Eden Prison on July 20, 1934."
Because the victims had no known relatives, Mrs Lakey was buried in an unmarked grave in Huntly, while her husband's remains became part of police's investigative and forensic training exhibits collection.
When forensic advancements meant that the collection was no longer required they were stored as back room exhibits before current NZ Police Museum curator, Rowan Carroll, commenced a three-year-long repatriation project.
In situations where there are no known descendants, police place memorial plaques over graves - which they have done for the Lakeys.
Ms Hassan said the museum had 37 sets of human remains, the last acquired in 1957.
Today's ceremony will take place at 10am at the Huntly cemetery.