>> the prosecutor of joe's case was carmen marino.ut that the prosecutor of the rape case was carmen marino. at the same time. so it doesn't take too much to ask that you put two and two together. >> yeah, i didn't see any connection. who would murder him for what reason? contrary to what you may hear, it is truly extraordinary that someone would murder another witness to keep them from testifying. >> but to joe d'ambrosio's defense team it seemed very connected. >> tony klann was the only eyewitness that was called by either side for that trial. the only eyewitness suddenly ends up killed and the case goes away. to us, that was a far better motive and opportunity than the prosecution had theorized. >> in order to prove their theory, joe's team would need to interview the alleged rape victim. but chris longecker had vanished without a trace. the new discoveries in joe's case caught the attention of one of the most prominent law firms in town, jones day, which agreed to fight for joe on a pro bono basis. >> it was like night and day. i