Z Nation

Murphy is desperate to get to California due to his worsening condition.  He tries to steal someone's car by biting them and taking their keys.  The man kept talking up his car and its upgrades while drunk in the bar earlier.  His skull key and paracord keychain matches the description of the ride.  From episode 7 Welcome to the Fu Bar.

The gang is using a white van which has a basic pink/purple fob.  Murphy steals the van, which is full of valuable oxycotin, at the end of the first season leaving everyone else to die.  From Episodes 12 and 13.

Criminal Minds Season 1 Episode 1 Extreme Aggressor

The real villain's keychain is revealed just as he is.  It is a metal z which represents his car.