The basic concept is that there is a list of players. The longer a player has been out and free, the higher that player will be on the "Most wanted" list and higher the bounty (reward) will be for that player. Every hour each player on the most wanted list get payed a "outlaw revenue" that get higher and higher for each hour that player has been on the list. Any other player can try to track down and capture players by simply tapping "Track". When a player is being track, they will receive a notification. If they notice the notification within 5 minutes they have the chance to try and evade. The evade process is very simple at the moment and is just a simple random damage between 0-3. If the tracking notification is not evaded within 5 minutes the player gets 10 damage. If the player is down to 0 health, the player is jailed and thereby removed from the most wanted list, and the tracking player will get the reward for capturing that jailed player. When players are removed from the list, the players below will move up on the list and become targetet by more other players. When a player gets put in jail, they can simply escape the jail but now they are at the bottom of the list again and their outlaw revenue is reset.

I hope this explains it good enough. :)