Gangsterism can be terrible. Gangs feuding, staging shootouts in the middle of streets with innocent citizens caught in crossfire.
To put a stop to it, Kenyan policeman Ahmed Rashid is taking the laws into his own hands, getting the gangsters whichever way he can: alive or dead.
Videos have surfaced online of him shooting dead unarmed youths on the streets.
BBC has in their most recent episode of African Eye taken a trip with him, hunting down gangsters.
See the episode below: