Inmate in Putnam County Jail showing his jail house tattoo.
A jail house tattoo is when someone takes a needle and ink and repeatidly pokes them selves with the needle then covers the open poke that the needle has made and puts ink over it.
Tattoos are used among to show gang membership and record the wearer's personal history--such as his or her skills, specialties, accomplishments and convictions. They are also used as a means of personal expression. Common tattoos are names of relatives or gang members, symbols of aggression, tattoos advertising a particular skill, or religious imagery. One of the most well-known tattoos is the teardrop tattoo, which commonly indicates the bearer has killed.