The Accidental Plague by Jeanne Adams

Outcast Station is a backwater, but for BVax Scientist Ravinisha Trentham, any posting is better than washing dishes.  Ravi is top in her graduating class, but only Outcast would hire a McKeonite.  Someone on station wants her dead, but when a plague breaks out, Ravi may be their only hope.  If the murderer gets to her first, everyone will die.

The New Badge by Nancy Northcott

Deputy Marshal Hank Tremaine crosses the wrong person and lands at Outcast Station, the armpit of the Terran colonies. Although he doesn’t yet know the ground or the customs, his hostile boss promptly assigns him to a backcountry murder.  Solving it will help redeem his reputation and get him back to more civilized space.  Failing to find the killer, though, will bury his career once and for all.