|Detective Rex Coughlin|
|Real Name:||Rex Coughlin|
|Family:||Robert Coughlin (brother)|
|Status:||Deceased - Gabriel Waincroft|
|First appearance:||Hana Lokomaika'i|
|Portrayed by:||Robert Knepper|
He was killed by Gabriel Waincroft in the episode Pono Kaulike (episode) instead of signing the statement he stabbed him in the eye with the pen.