Grand Theft Auto: San Andreas/Running Dog

An easy mission if you have your Stamina maxed out by working out in the gym, or have upgraded your weapon skill with the 9mm pistol to at least Gangster level. After watching the cutscene, chase after the running Vago, jumping over fences as necessary.

Eventually he'll run in front of two other gang members; don't stop to kill them, they'll only slow you down.

Once you're close enough to be within targeting range grab your 9mm and kill him, preferably with a headshot to ensure he doesn't escape wounded. Simple as that. You shouldn't need to fail on this mission.

Rewards

 * Respect: +3