Jennings Foster is the Head of CSI who helped David Tapp solve murder cases. He had accidentally killed somebody in a hit and run and then framed someone else as the killer, unbeknownst to his colleagues. This came to the attention of Jigsaw, who later kidnapped Jennings and placed him in a pendulum trap as part of Tapp's game in order to save him. Tapp managed to save Jennings from death, although he then blamed Tapp for him being placed there and ran off.