Mugging a player, similar to other attacks, send the target to the Hospital if successfull. Where mugging differs is that the attacker will take 10% of the targets Cash on hand, assuming the target does not have Mug protection.
Mugging gains can be increased by 5% up to 50% for a total of ? from purchasing Calm Negotiator Reward levels in Achievements
The target will also be placed in the Hospital for roughly 35 minutes, 15 minutes less than a standard attack.
Mug protection acts as a safety mechanism for players to ensure that it's not possible to repeatedly mug them in a short period of time to acquire all held cash.
This is handled by the Player receiving Mug Protection covering the full amount that was held after a previous mug. Any Cash that is received after the last mug has no protection.

Mug Protection then reduces by exactly 0.0023% per second, or 0.138% per minute until it reaches 0. If the target is mugged at any point then the Mug Protection increases back to 100% of the Players Cash on hand.
Mug Protection is reset if the target player does any of the following actions. This list is not exhaustive.
See also: La Paz Market · Features overview · Beginner's Guide