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Over the last month, Kathleen Zellner, Steven Avery's lawyer, has been dropping some bombshells to fans on Twitter about her groundbreaking revelations in the case.
And now, another member of the Dassey family has come forward to say evidence had supposedly been tampered with. Here's everything you need to know about Steven Avery's case.
Since then, Brad Dassey - Brendan's half-brother - has claimed that his uncle Avery is innocent and that his step-mother, Barb Tadych, wiped the family laptop of pornography before it was seized by authorities.
A new court filing on 13th April states that a delivery driver has come forward and said he saw Bobby with an unidentified, bearded man in his 50s-60s pushing a Toyota RAV-4 onto the Avery property in the early hours of 5 November 2005.
On 14th April, Zellner tweeted: "To all the Steven Avery supporters: Thank you for all the tips on the accomplice. We should have him identified very quickly." Watch this space.
The last development in the case was in June 2020, when Avery's lawyer filed The Avery Reply Brief with the optimistic message, "We're going to win this!!!"
This came as a counter-response to The State of Wisconsin, which, after the filing of Avery's appeal, submitted a 130-page document asking the court to deny Avery a new trial.
As of May 2021, Steven Avery remains in prison for the murder of Theresa Halbach in 2005, as told in the the 2015 hit true crime documentary, Making A Murderer. Avery has always maintained his innocence and believes he was framed by the Manitowoc County Police Department after he sued them for wrongful conviction in another case.
In 1985, Avery was imprisoned for sexual assault and attempted murder. It wasn't until 18 years into his 20-year sentence that DNA evidence proved he was innocent and he was released.
After his release in 2003, Avery filed a $36 million lawsuit against Manitowoc County and received a small fraction of this as a settlement.
Two years later, Avery was convicted of Halbach's murder and sentenced to life without parole.
The Netflix series, which covers Avery's 2007 murder trial, has garnered international attention for the case and brought new evidence to light.
Viewers learnt about witness coercion and tampering with evidence on behalf of Manitowoc County, who Avery believes framed him for the murder as payback for suing them in 2003.
Avery's nephew, Brendan Dassey, is also serving time for the murder.
In 2019, attorney Kathleen Zellner - who featured in the second season of Making A Murderer - stepped up her efforts to fight for her client's justice.
In February 2019, Avery won a motion to appeal in a Wisconsin circuit court, which meant that the court would reexamine the case.
Zellner's appeal argued that the bones discovered in the gravel pit on the Avery property, believed to be Halbach's, had been mishandled by authorities when they were given to the victim's family in 2011, without notifying the defence.
In August 2019, the defence's bid for a new trial was rejected in the circuit court, meaning Zellner and her team had to continue to pursue their appeal in Wisconsin's appellate court.
Unlike the circuit (district) court, an appellate court doesn't retry cases, hear witness statements, see new evidence, or have a jury. Instead, it reviews the procedures and decisions made in the original case to ensure the legal proceedings were fair and the law was applied correctly.
Zellner continues to fight for her client's justice. Regarding the next steps, Avery's appeal - and the arguments for and against - is being deliberated by a judge who will decide if Avery should be offered a new trial.
If this fails, the defence could even escalate Avery's case to the Wisconsin Supreme Court.
If Zellner's appeal wins Avery a second trial and it is successful, it will be the second time he has been exonerated from prison.
In December 2020, Zellner tweeted, "Steven Avery is strong, healthy & adamant as ever about his innocence. The details of the story he tells about 10/31 never change."
At the end of the second season of Making A Murderer, Zellner makes two of the biggest discoveries in the case so far:
Since then, fans wonder (and hope) if there will be a third instalment of the true crime series.
Nothing has been confirmed just yet, but filmmakers Laura Ricciardi and Moira Demos did tell Cosmopolitan in 2018 that it could definitely be on the cards.
And with such a revelation from Avery's lawyer in April 2021, it's hard to imagine there won't be a Making a Murderer season three.
Steven Avery has managed to keep up a dating life despite serving a life sentence in prison.
Long before the Halbach case, Avery was married to Lori Mathiesen, who he had four children with. They divorced while he was in prison for a rape case, which he was wrongfully convicted for.
Season 1 makes reference to Avery's previous marriage to Mathiesen. Throughout the docuseries, we meet Avery's more recent partners - Jodi Stachowski, Sandy Greenman and Lynn Hartman.
Stachowski was in prison herself for drink-driving when they met, which was around the time of Halbach's death. Once she left prison, Stachowski was involved in the filming of the documentary and continued to back Avery's claims that he was innocent. That is, until January 2016, when she changed her mind and said that he wasn't.
Later on in the series, we meet Sandy Greenman, who started writing to Avery in prison after watching his trial being covered on TV. Sandy began visiting Avery in prison while her husband at the time was suffering from dementia and Parkinson's disease.
After her husband's death in April 2008, Greenman's relationship with Avery grew and they eventually got engaged. But Greenman broke off the engagement in January 2016.
In September 2016, Avery got engaged to legal secretary, Lynn Hartman. Just over a week later, Avery broke off the engagement, claiming that Hartman was in the relationship for the money.
No new relationships have been confirmed since Avery broke off his engagement with Hartman. But Greenman stays in touch with Avery, upholding the belief that he is innocent. She regularly updates her social media followers about Avery.
Steven Avery has always upheld his innocence in the case.
In late 2019, another inmate confessed to the murder of Teresa Halbach while talking to the documentary producers. But the legitimacy of the confession wasn't confirmed.
Brendan Dassey has, like his uncle, always pleaded innocent and the documentary has brought international attention and support to his case.
His lawyer, Laura Nirider, tweeted in January 2021, "Five years after #MakingAMurderer, your commitment hasn't wavered a bit. Neither has ours."
Both Dassey and Avery remain behind bars and their lawyers continue to fight for their freedom.
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