>> deborah feyerick brings us this story of a man who is now sitting in prison, maybe for life, even after the trial that put him there was found by a judge to be full of holes. >> i was convicted of second-degree murder with depraved indifference in 1997 and sentenced to 20 years to life. >> reporter: new york city police officer richard diguglielmo served 11 years in prison before a judge tossed out his conviction and he was sent home. his friends and family celebrating his release. when you walked out -- >> it was surreal. i couldn't believe it. my ankles weren't shackled and i was like, wow, this is real. >> reporter: a free man, diguglielmo spent two years rebuilding his life. he got a job, an apartment, a wife, then just as suddenly, in a twist of the criminal justice system, it was all taken away. >> i still can not adjust being back here. it is difficult. it is difficult. >> reporter: richard's diguglielmo bizarre journey began here, dobbs ferry, a charming village 30 minutes outside new york city. on october 3rd, 1996, the small community was rocked by a deadly shooting, tri