Moon Dog - Space Life Series

The Moon colony's part-time cop wakes up one Sunday morning to reports of a hung girl. He is told to bury her as a depressive teen suicide. Theirs is a post-apocalyptic world. People shuttered underground from a poisonous atmosphere caused by disaster have many issues. They occupy one of Earth's fledgling alternative home sites off planet. Boris, the cop, a stubborn man, quickly discovers that all is not what it seems to be.
The girl may have been murdered. He can't let it go.