Plot Synopsis

Prosecutor Anna-Sigga Nicolazzi and defense attorney Darren Kavinoky go head-to-head to break down some of the trickiest murder trials in history, leaving the viewer to decide whether the accused really committed crimes. DID HE DO IT? follows Nicolazzi and Kavinoky as they present their respective prosecution and defense arguments of a case. Transporting viewers to the forefront of famous homicide trials, each episode features one highly-debated story interlaced with expert commentary from Nicolazzi and Kavinoky, as well as friends, family, law enforcement and victims of the crimes. Each one-hour episode focuses on a different case, including those of: Steven Avery, who is released after 18 years in prison, when evidence reveals he's innocent of a vicious attack on Penny Beerntsen -- but within months he's arrested again, this time for the murder of a young lady; Frank Sterling, whose brother Glen was convicted of an assault on Viola Manville a few years before Frank goes to prison after he confesses to murder when Viola's body is found beaten to death -- but 18 years later, new evidence blows the case wide open; and many other criminals whose stories are revisited.
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On Thursday, May 7, 2015 at 10pm ET/PT, Investigation Discovery premiered the season finale of DID HE DO IT? In the season ender, "Burden of Proof," Toni Lister is the victim of an attack; her body is found with 27 stab wounds. The suspects? Husband Calvin and friend Jimmy. There's insufficient evidence to charge either with murder. 24 years later DNA testing finally reveals the killer's identity.