Steven Sing

Saw
Steven Sing worked alongside with David Tapp on the Jigsaw case, specifically Paul Leahy's and Mark Wilson's test locations. After being presented a penlight, discovered by Allison Kerry, they track down the doctor who's prints it had on it, which belonged to Lawrence Gordon.

The confront him in his office at the hospital, and take him into custody. Though after taking his alibi and verifying it, they had let him go, but requested his presence as Amanda Young, the first (and at the time, only) survivor of one of Jigsaw's twisted games.

One evening afterwards, Tapp is examining Amanda's tape for any clues. He finds two, one being a location, along with a potential time of recording for the tape. Sing and him go down to Jigsaw's lair and look around. There they lift off some red sheets, which expose Billy (the doll), along with a model for the Bathroom Trap. Movement comes from to their left, and they uncover a man by the name of Jeff Ridenhour, who is strapped to the Drill Chair.

Soon after they discover him though, Jigsaw is coming up the elevator. They recover Jeff and hide themselves. Jigsaw walks up and uncovers Jeff and speaks some words to him, at which point Sing and Tapp come out of hiding and tell Jigsaw to step away from the man and get on his knees with his hands up. Before walking down though, Jigsaw activates the chair and the drills begin to inch closer to Jeff's neck.

Jigsaw informs them that they have but seconds to unlock Jeff's collar with the key found in the box beside the chair, or he will die. Asking them which is more important, catching him, or letting an innocent man die. Tapp starts to take Jigsaw into custody while Sing tries stopping the device, which in the end results in him shooting the drills off. Jigsaw by then has slit open the throat of Tapp, who wasn't paying proper attention, and runs off.

Sing follows him until they come to a hallway, where Sing finally shoots Jigsaw in the shoulder, a metallic noise sounding upon impact. Sing slowly approaches the body now lying on the ground, and steps through a cobwebbed opening, triggering a hairwire and setting off the Quadruple Shotgun Hallway Trap, killing him instantly.

Saw V
Given a memorial, along with the other Officers who gave lost their lives while working on the Jigsaw case.