Jackson Davis is shirtless on the episode "The Panty Sniffer" of CSI. Sorry about the blurriness. He moves too fast.

Jackson Davis Shirtless on CSI s10e16
Jackson Davis Shirtless on CSI s10e16
Jackson Davis Shirtless on CSI s10e16
Jackson Davis Shirtless on CSI s10e16
Jackson Davis Shirtless on CSI s10e16
Jackson Davis Shirtless on CSI s10e16
Jackson Davis Shirtless on CSI s10e16