I'm not sure specifically what is done in CT to combat gangs, as I am not in LE yet. But this is something I have always had a large interest in. Here are a listing of some gangs in and around CT, this listing is not exclusive.
"People" or "Folks"
Asian Boyz
Greenville Crips
PPP (Purple Philippino Posse)
Asian Family
Jamaican Posse
SuiCiDe Kings
Bloods
Crips
Jungle Boys
T-Street Playaz
Brotherhood
Jungle Brothers
Texas Syndicate
Brotherhood of the Struggle
La Familia
The Association
Dominos
La Hermandad de Pistoleros Latinos
The Mob
East Coast Crips
Latin Kings/Queens
Tiny Rascals Gang
East-West Syndicate
Latin Locos
TRE'
El Rukns
Los Solidos
Trigga Luv
Elm City Boys
The Hells Angles
Tha Pagan
The Bandidos
The Outlaws
20 Luv
EME - Mexican Mafia
Nations
West Side Lynch Mob
Exotic Foreign Crip Creation
Ñeta
Aryan Nation
KKK (Ku Klux Klan)
Black Hebrew Israelite (BHI)
National Social White Peoples Party
The Association
BOWS (Brothers of White Strength)
Church of the Creator Stormfront
White Aryan Resistance
The Nation of Gods and Earths
The Order of Thulle
Southeastern Gang Activities Group
Some that are listed on a seperate link in that website for CT (even though the above list states the same) are the following:
Almighty Latin King and Queen Nation, Almighty Latin King and Queen Charter Nation, Black Gangster Disciples, Bloods, Crips,(numerous sets of each), Gangster Disciples, East Coast Foreign Crips, 1% Motorcycle Clubs (Hells Angles, Branded Ones), Nation of Gods and Earths aka Five Percenters, Ku Klux Klan, La Ñeta, Los Solidos, Mara Salvatrucha, MS-18, MS-13, Skinheads, Straight Edgers, Vice Lords
Gangs in Prison - Aryan Brotherhood, Nation of Gods and Earths aka Five Percenters, Ñeta, Latin Kings, Los Solidos, 20 Luv, Nation, Mexican Mafia, Texas Syndicate
One note on that - "Straight Edgers" are NOT, I repeat NOT a gang. It is a lifestyle. While some people who are straightedge are rough around the edges on the East Coast they are not gang members. That is different in Salt Lake City and other Western Cities though.
Here are the gangs for MA:
Almighty Latin King & Queen Nation, Asian Boyz, La Familia, La Neta, Latin Kings & Queen Charter Nation, Los Solidos, Skinheads, Tiny Rascal Gangsters, Great Circle Boyz, Nation of Gods and Earths AKA Five Percenters
Gangs in Prison - Aryan Brotherhood, Asian Boyz, Black Gangster Disciples, Black Guerrilla Family, Bloods Crips (numerous sets of each), Nation of Gods and Earths AKA Five Percenters, Jamaican Posses, Ku Klux Klan, La Familia, La Nuestra Familia, Ku Klux Klan, Latin Kings& Queen Charter Nation, Almighty Latin King & Queen Nation, La Neta, Skinheads, Vice Lords: Many of these gangs are also found to operate in the streets after release.
Enjoy.