CSI: What's Eating Gilbert Grissom?

SYNOPSIS

The dismembered body of a college student is found and the CSIs realise a killer they failed to capture has resurfaced. To make matters worse, he seems to have refined his methods, using a wood chipper to dispose of the bodies. The murderer leaves a trail of grisly clues leading to another corpse and, despite delivering a taunting message saying he will give himself up, he still has another trick up his sleeve.