Bounty hunter

A bounty hunter is a person who hunts criminals or fugitives for a reward, usually money.

In the mid-22nd century, two bounty hunters, Skalaar and Kago-Darr, independently sought to capture Jonathan Archer to turn him over to the Klingons for a reward. 

After Joret Dal, a Cardassian, provided the Federation with military information about the Cardassians, he had to return to Cardassian space. The plan required the help of Ensign Sito Jaxa, who was disguised as a Bajoran terrorist to let Joret Dal look like a bounty hunter. 

The Hazari of the Delta Quadrant work as bounty hunters, who pride themselves on honoring their agreements.