(coexisting on another dimensional plane)
This page contains information regarding Star Trek: Discovery, and thus may contain spoilers.
In the 2250s, Connor served aboard the ISS Shenzhou under Michael Burnham. After Burnham went missing and was presumed dead during a mission, Connor struggled with others to succeed her and finally assumed command of the Shenzhou.
Connor was subsequently killed by Starfleet specialist Michael Burnham, disguised as her counterpart, after he attempted to kill her in a turbolift when she had seemingly returned to the Shenzhou after faking her death. (DIS: "Despite Yourself")