Attorney Laura Nirider, left, and her client Brendan Dassey, inset. Fox 9 Minneapolis, Netflix "Making a Murderer" subject Brendan Dassey's attorney, Laura Nirider, says that of the many things wrong with the police interrogation of her client, there's one overarching problem.

The attorney presented her assessment of the police interrogations — which led to Dassey's contested confession that he helped his uncle, Steven Avery, murder photographer Teresa Halbach — at the University of St. Thomas School of Law on Monday.

"I believe that Brendan Dassey's confession to rape and murder of Teresa Halbach is false," Nirider told a sold-out audience, according to Fox 9 News in Minneapolis.

Nirider, an expert on false confessions by juveniles, pointed out several aspects of the Calumet County, Wisconsin, police interviews that would contribute to a false confession. But her most striking point was that the officers' tactics should've never been used on her client.

Nirider, who is fighting for Dassey's post-conviction relief, said that the police used adult interrogation techniques on a youth (Dassey was 16 years old at the time of Halbach's death, and his IQ was at the cutoff for intellectual disability), which can result in misreading the signs. Here's more of what she said in her presentation: