Steven Grant (29) had been arrested a while back in Milford Haven, UK. Grant ran a martial arts dojo named Slicks Martial Arts where he offered to:
".. teach many aspects of Martial Arts including, but not limited to, Kung Fu, Kickboxing and MMA"
source: https://dojos.co.uk/SlicksMartialArts/
Grant reportedly choked 2 underage boys to the point of unconsciousness - and offered them McDonalds for it. Grant admitted knocking one of them out on two separate occasions.
Steven Grant a.k.a “Slick” (a nickname, like his many black belts in multiple styles, he gave himself) of Slick’s Martial Arts is well known in the martial arts community for his lies and has been an accident waiting to happen for years.
Slicks also had kids self defense classes:
Internet archive was kind enough to preserve Grant's own account of his martial arts history detailing:
Steven Grant created slick’s Martial Arts during August 2012. Steven has 20 years of experience in Martial Arts and has dedicated the majority of his life to his passion. First inspired by Bruce Lee, he enrolled in a Lau Gar course in 1998 attaining a Blue Belt which furthered his interest and passion in Martial Arts. Enrolling in a Kung Fu class in 1999, Steven had become a 1st Dan Black Belt in Kung Fu by 2005. As well as being a Fully Qualified Martial Arts Instructor, Steven is a member of WUMA British Squad.
source:https://web.archive.org/web/20121228011507/http://www.slicksmartialarts.co.uk:80/
a later version of his site amped it up saying:
Steven went on to learn Kung Fu and Kickboxing as well as attending Martial Arts Summer Courses in the Chris Edgerhill Academy for 3 years. Steven also travelled 3 times a week to train in kickboxing and gained his black belt in kung fu by the age of 12 and his brown belt in kickboxing by the age of 17.
source: https://web.archive.org/web/20160409231957/http://slicksmartialarts.co.uk/index.php/2013-11-27-01-02-02/about-steven-grant
Judge in his court case sentenced him to six month suspended prison sentence for two years and ordered to carry out 150 hours unpaid work. He also got a restraining order not to approach his victims for 7 years. source: https://www.walesonline.co.uk/news/wales-news/martial-arts-instructor-choked-schoolboys-14697126