Michael Eddington

Michael Eddington is a Starfleet lieutenant commander assigned as security officer to Deep Space 9 in Deep Space Nine, initially creating friction with Odo. In "For the Cause" he reveals himself as a secret member of the Maquis and defects, becoming Benjamin Sisko's personal obsession. Sisko eventually captures him by poisoning a Maquis colony world's atmosphere, forcing his surrender. Later released to help Sisko stop a Maquis missile launch, Eddington dies in "Blaze of Glory" covering the escape of the surviving Maquis.