Availability: Michael or Trevor
Location: One of the detached houses in the El Burro Heights district, in the Eastern part of Los Santos.
Stop near the woman crying for help. Follow her but be prepared with a good firearm, because it is a trap and you will soon be attacked by armed gangsters. Deal with all of them (it is a good idea to use Michael's time-slowing skill here, or Trevor's fury mode) and collect the weapons, ammo and cash that they dropped.
Rewards for the completion of the event: none