Transcript for 'Making a Murderer' Star Steven Avery Slams Lawyers in New Letter

this new twist in the criminal case behind the netflix megahit "Making a murderer." Steven Avery is appealing his conviction and lashing out at the lawyers who defended him the first time around. ABC's Eva pilgrim has the latest. Good morning, Eva. Reporter: Good morning, robin. Steven Avery is currently behind bars serving a life sentence for the murder of Teresa Hallback but this morning he is placing the blame of why he's behind bars on his former lawyers saying they didn't do their job. Steven Avery, the man at the center of the true crime sensation "Making a murderer" -- I want people to know I didn't do it. Reporter: This morning for the first time slamming his former lawyers destrange and Jerome budding. In a letter writing dean and jerry didn't do no investigation on this case, if they did, I would not be in prison. Avery also calling for the pair to lose their licenses to practice law adding lawyers should be responsible for they wrongdoing. We the jury find the defendant Steven a. Avery guilty of first degree intentional homicide. Reporter: More than 19 million just here in the U.S. Watched the netflix docudrama that put a spotlight on Avery's case, the 54-year-old currently behind bars convicted in 2007 to life in prison for the murder of 25-year-old Teresa Hallback. You know, in prison for something you didn't do and have to do it all over again. Reporter: He long claimed he was framed and claims his former lawyers reiterated to ABC a new months ago. I'm still left with real reasons to suspect that. Reporter: But now Avery is turning on that legal team blaming them for his incarceration. His new letter listing 15 complaints including a lack of experts and claiming they ignored the evidence writing that the pair wouldn't tell me what was going on in my case at all. Those lawyers denying those claims to ABC overnight saying "Because he was in jail before his trial, Steven could not know immediately all of the investigative steps we took on his behalf." Avery's new concern Kathleen Zellner who built a reputation for success if I appealing wrong convictions is now appealing his. I think that the evidence used to convict him was planted, I think he was framed. Reporter: Now, Zellner seems confident saying they have found new evidence, evidence that we will get a look at in the new season of the show on netflix. His former lawyers will offer his new counsel any information they need.

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