Steal an LCPD car and turn the siren on before entering the corona. This helps keep collisions to oncoming traffic to a minimum. Also, you do not have to go through the corona as long as you pass by it closely. After the mission there will be an intermission sequence where Sucho will drive by you and take off. Kill him in order to finish the mission. Keep the siren on the police car and pursuit him, then drive by and shoot the Thunderrod with your gun (Mac 10, Uzi, or Tech 9). When he gets out and runs, run him over or shoot him. Chase him on foot if necessary to finish him off.