peggy perales' pen pal relationships with two inmates from rival gangs have already caught the attention of the bexar county jail's gang intelligence division. >> so you got a guy that you have a child with but you're writing to somebody else as well? correct? >> one of the letters written to perales was intercepted by mail room staff, who suspected it might contain gang codes. now, she has some new trouble. >> perales? >> yes, sir. >> since the last time we spoke to her we did a background check on her history in the facility and her last incarceration, she was involved in a report, she was an aggressor in a fear for safety and accusing the inmate of being an informant in reference to some narcotics that might have been in the unit. that they were living at. >> given this new information, officer rodriguez has read all of perales' mail in order to look for more gang ties.