[5] The initiator and leader of the organization was Danny "The Hood" Fitzpatrick (born 26 February 1953, assassinated 18 June 1998).

A number of murders inside the Kumla and Tidaholm security prisons during the 1990s are believed to have been committed by The Brotherhood.

Therefore, Brotherhood members inside the security prisons started to use the addition "Wolfpack" to emphasize a status difference.

During the period 1996-1998 several Brotherhood members in Stockholm were arrested and convicted for various crimes such as extortion, illegal possession of firearms and abduction.

[14] During his celebration party a defector from the club was shot in the leg and another man received an axe blow to the head.

The Brotherhood recruited many well known criminals in the Göteborg area during the years 1999-2000 and established a strong presence on the Swedish west coast.

A recently paroled member of the Västerås chapter disappeared at the beginning of the summer and the police assume that he has been murdered.

The former vice president and one of the members disappeared at the end of August and was found dead and buried in a quarry in the spring of 2002.

Ten hangarounds and prospects were also excluded from the Göteborg chapter in September 2001, probably for choosing “the wrong side” in the conflict.

The Police in the Göteborg district came down hard on the gang and in 2004 some 20 members of the Brotherhood were jailed and convicted in a number of cases concerning illegal drugs, assault and battery, abduction etc.

The Brotherhood is basically a prison gang and its members quickly adapt to new circumstances and reorganize the organization.

In 2005 The Brotherhood was in a conflict with another criminal gang and many acts of violence were committed between the two groups, especially inside the prisons.

At the end of 2005 yet another internal conflict erupted within the organization and this resulted in the exclusion of the National Vice President and the dissolving of the Helsingborg chapter.

In 2006 several Brotherhood members were released from prison and the gang's criminal activities increased once again on the west coast and in the south.

[22] A member of the BSK Support gang in Kristianstad got an ear cut off in what is believed to have been the settling of an internal dispute.

The investigation showed that it probably was an accidental shot and an acquaintance of the Brotherhood member was sentenced to a shorter prison term.

[27] The Brotherhood chapters outside the prison walls are located in the cities of Göteborg, Stockholm, Västerås, Kristianstad, Uddevalla and Malmö.

The Swedish Police call the gang's activities ”multi criminal” and deem the Brotherhood members as extremely violent.

[29] The fictional character Mattias Nilsson, from the Mercenaries series of video games, is a member of the gang, and in the in-game universe is the reason behind its criminal history.