Harm City Homicide was one of the first men's derby teams in the county, founded by Charm City Roller Girls referee Justice Feelgood Marshall in 2007.

[1] Harm City Homicide played the first men's full-length bout with WFTDA rules against the New York Shock Exchange in 2008.

In 2010, the team participated in the first-ever official men’s roller derby season and hosted that year’s championship, taking 3rd place overall.

[3] In 2012, the league was restructured, joining with a newly created team serving Cecil County, Maryland, the Rollin' Regulators, which had been founded in 2011 by a Harm City Homicide skater.

Later that year, a new team serving Frederick, Maryland, Khaos, also joined.