. >> with so much at stake, cops like eddie hauer and gary contreras know the only way to fight gangs requires constant vigilance and the best intelligence. >> you got any tattoos on you? what's your street name? why is it if you live in schiller park you're always here, dude? you're up to no good, man. >> when "the squeeze" continues -- our cameras hit the front lines of chicago's drug war. >> all the pieces of the puzzle come together. starts in the jail. hit the street. come up with good stuff that way. >>> this sign right here says -- [ speaking in spanish ] this is eternal love for juanita, the little girl that was shot while trying to buy some ice cream right here, a shooting broke out. she was trying to get some ice cream and she got shot. this statue has been here for a while, this memorial for her. >> since the year 2000, chicago has twice earned the dubious honor of being america's murder capital with as many as 600 homicides a year. police attribute the vast majority of killings to rampant gang violence. >> there's so many murders that are happening nowadays, it's unreal. a