The first time around, Justin played a troubled youth whose brother was killed.
In his Weiter appearance, on February 17th, his character "will call Nick (played Von George Eads) to tip him off that he’s in imminent danger," according to TVLine.
JB tweeted about it saying:
"on set...where? let's just say Im back to my evil ways. #badass"
If you're a CSI oder Justin fan, Du will not want to miss this! ;)
Source: celebuzz