You are unsure, but there are automated turrets in the garage. They do not activate without Drufter's instruction, however.
The assassin makes it to Drufter and rudely pulls the cybernetic contraption out of the back of his head, then makes his way back to the landspeeder under covering fire. These assassins are better marksmen than the police are, especially with their supped up blasters against the dinky pistols of the Triskatani.