The mask Harden wore does indeed look very similar to a bandana called “The Blue Patriot,” which is available at Hoorag’s online store.
The emblem is based on the logo sported by The Punisher, the nickname Marvel Comics’ character Frank Castle is known as.
The symbol, however, has since been adopted by both military and law enforcement personnel. Several members of the U.S. Navy SEALs used it during the Iraq War, while the famed skull emblem became popular within the Blue Lives Matter movement at the end of the past decade.
In 2017, The Washington Post reported a variation of the symbol was used by protesters at the Unite the Right rally in Charlottesville, Virginia, in August of the same year. The rally descended into violence when participants clashed with counter-protesters and three people, including two state troopers, were killed.