paramedic chris hickey shows us the needles, the tool kits. children and their parents often finding them. you've got families calling you saying there are needles in the park, needles on the little league field. and he tells us that if the needles are everywhere, so are the dealers. who's most vulnerable. we watch as this man walks right camera. listen to what he tells us. how easy it would be to give savannah heroin. and once she's hooked again, more business for him. >> it's like a pyramid scheme. okay, like, i'm at the top, i get it from wherever i get it from. the more people i can get to sell and buy off of me. >> and to do it. >> the more money i make. which i don't sell anyways, anymore now. i got a job now, but -- >> so even though there's like this wonderful, new young mother, you'd still try to like pull her back down? >> it's not about who i am or heroin. >> they're dirtbags. i don't associate with those people. >> reporter: when we come back, we witness the biggest test yet for this young couple, and their baby. will their past, w