Forum:How to obtain AP Infernus in the mission "Beat Down on B-Dup"?

So, i've look in the wikia, it said "Kill Sweet to fail the mission, then store it using the tow truck to the garage." now, i've tried towing it, but while towing it, i had some ballas idiots shooting at me, and some of the bullets hit the Infernus, so i was thinking could it be AP? i think someone got to change the walkthrough or maybe add a little bit detail, like, when exactly do i kill sweet? etc