SACRAMENTO, Calif. (AP) — Sixteen state firefighters were placed on paid administrative leave Monday for unrelated policy violations that grew out of an investigation into allegations of firefighters having sex on fire trucks, officials said.

The investigation began in May after fire academy instructor and battalion chief Orville Fleming was charged with murder in the death of a former escort who became his girlfriend.

Fleming’s estranged wife told Sacramento County sheriff’s investigators and reporters then that she had viewed a video showing the victim, Sarah June Douglas, 26, having sex with her husband and other firefighters on fire trucks.

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