Ballistics tests showed a projectile found at the apartment matched that of a police-issue firearm. The weapon was later found inside a police station safe.
Police allege the killings were “of a domestic nature” and not a “gay hate crime”.
The suspect had been a celebrity chaser and blogger before joining the police force.
He had been photographed with scores of stars including Taylor Swift, Miley Cyrus, Lady Gaga and Ben Stiller.
He was previously investigated over the aggressive tasering of an Aboriginal man in 2020 after a video of the incident emerged online.
News reports from 2014 indicate that he came out publicly as gay by throwing a letter onstage at a Lady Gaga concert, which the star read out to a crowd that included his sister.