McShep where Rodney has a tattoo after being in a gang when he was young

Like the title says, this is a McShep story where Rodney takes off his shirt and his tattoo is revealed.  He explains that because he was in a gang when he was younger (forced because of Jeannie or something?) he had to get a tattoo.  The story has an image that accompanies it of a young Rodney and an SGA-series-aged Rodney with the tattoo.

Thanks!