In The Godfather, knowing that Sonny was a hothead and would immediately go to Connie's house after Carlo beats her up, he is ambushed at the highway toll booth by (presumably) Tattaglia men.
The ambush they have in place seems unnecessarily elaborate: involving at least eight men, seven of whom are definitely armed with automatic weapons (Tommy guns); two booths acquisitioned by the assassins and at least one car. Although the failure at killing Vito earlier (by just two guys armed with pistols) would have made the plotters more careful concerning the possibility of failure - surely this overkill in relation to Sonny was totally unnecessary and if anything, a liability?