In South Korea, drug laws are extremely strict and professional gamers withhold no exception to this rule.
The support player for Incredible Miracle was reported as being arrested by Korean police in a drug bust by two South Korean publications. Cha 'Livy' No-ah has been playing League of Legends professionally for over a year starting in last year's Olympus Champions.
Using and posessing weed in South Korea is penalized harshly and can be fined or terms for the user to go to prison. Citizens in the past have been arrested on the spot after testing positive for marijuana, and this player is no exception.
Source - PCGMedia