A bystander took the law into his own hands when he took down a man running from police.

The man on the bike had a knife while running from police in Wales, but that did not stop the bystander from taking him down like he was an outside linebacker in the NFL.

As the man on the bike approached the intersection the good Samaritan came out of nowhere and knocked the "bad guy" off his bike. Police were soon able to apprehend him.

Perhaps if more people stepped-in and assisted police here criminals would think twice about running.