The earliest you can do this is during
King of Chinatown.The simple and most effective way of doing this is shoot civilians as soon as you start the mission. You can die as soon as the trophy pops to resume the mission as normal.
If you do not remember the tutorial for point shooting then here you go.
1. Press and hold
to use your instinct.
2. Press
to activate point shooting.
3. As soon as things slow down, press
on 3 of the civilians heads.
4. Release with
.
If all 3 die from the point shooting the trophy will unlock.