It was after 11 on a sweltering evening when Justine heard what she thought sounded like a sexual assault in the laneway behind her house.
Worried, she phoned Don in Las Vegas. The couple agreed Justine should call 911.
"I'm not sure if she's having sex or being raped," she told the 911 operator, "But I don't think she's enjoying it."
The noises continued and when there was no sign of a police car by 11:35pm, she called again.
When the squad car arrived and drove down the laneway, she took the fateful decision to leave the house and approach the officers inside the car.
"I can only suppose that she came out of the house and realising that the police car had gone past the site of the incident, that she walked up to the police car," John said.
"And for some unknown reason, a man shot and killed her."
For Don Damond, waiting to hear back from her in a Las Vegas hotel room, the news when it arrived was incomprehensible.
“When bad men combine, the good must associate; else they will fall, one by one, an unpitied sacrifice in a contemptible struggle.” Edumnd Burke