logan confides in his childhood friend john neuwirth. >> he wasn't happy about what he did. labeled as a snitch, labeled as a rat. it's basically ostracizing him from the community. one month after logan is made confidential informant 8, the police are in touch with logan him again. they are returning that $700 they took from his dorm room. the news seems to brighten logan's dark mood. in a text logan writes "cops r giving me my money back! and we're in business!" and that he then went and used that money to buy drugs. >> right. >> reporter: money that, had he been arrested and had you been called, he would never have been able to use to purchase drugs. >> no, he wouldn't have been. >> reporter: instead, logan stays at umass, and soon comes the most dire of all of his texts. "i'm a heroin addict," he confesses to a friend. school's out." but he keeps all of this a secret from his mother. at the same time he is asking his mother for lasagna, the night before parents' weekend, ten months after he went undercover, he sends a message to a dealer desperate for a fix -- "my veins