Steven Avery's ex-fiancee Sandra Greenman Credit: Netflix

The plot thickens. A day after HLN aired its interview with Steven Avery's former fiancee, Jodi Stachowski, Dr. Phil announced on Thursday, January 14, that he had nabbed a new exclusive with his other ex-fiancee, Sandra Greenman. 

Greenman started dating Making a Murderer subject Avery after he was convicted in the 2005 murder of Teresa Halbach, and remained with him after his imprisonment, even getting engaged. Though she eventually called off their engagement — he refused to adopt Christianity as his faith — Greenman still keeps in touch with her ex and insists that he's innocent. 

In his upcoming interview, Dr. Phil asked the now 73-year-old why she's still in touch with the convicted murderer, 53. "I personally believe that he’s innocent," Greenman told Dr. Phil in the new interview. "I needed to show him that I was behind him."

Greenman's opinion of Avery contradicts what his other ex-fiancee, Stachowski, said during an interview with HLN's Nancy Grace on Wednesday, January 13. Stachowski maintained that Avery was "not innocent," and also claimed that she "ate two boxes of rat poison" to "get away from him."

Stachowski initially supported Avery on Netflix's Making a Murderer, but told Nancy Grace that she was coerced into lying to producers. “He told me how to act,” said Stachowski, who was in jail when Halbach was murdered back in 2005. “[He told me] ‘Smile, be happy’ — it was all lies."

She also said, outright, that she believed Avery murdered 25-year-old Halbach. “Yes, I do," Stachowski told HLN. "Because he threatened to kill me and my family and a friend of mine."

As questions continue to linger about the 10-part docuseries, another Avery opposer, Nancy Grace herself, has repeatedly maintained that he's guilty.

Dr. Phil will also speak to Grace on Friday, January 15. “Steve Avery is the real killer of Teresa Halbach," the HLN host told Dr. Phil. McGraw also interviews Sheriff Ken Petersen, who was the Manitowoc County Sheriff at the time Avery was arrested for Halbach's murder. In the twist, Petersen was also the sheriff when Avery was wrongly convicted in the rape of a woman, and ended up spending 18 years behind bars for a crime he didn't commit.

According to Petersen, Avery murdered Halbach. “I think he would kill again. Prison is a good place for him," the former sheriff said. "He can’t hurt anybody and no one can hurt him.”

Dr. Phil will also interview Avery’s former defense attorney Dean Strang, as well as current Manitowoc County Sheriff Robert Hermann.

Tune in to Dr. Phil's two-part special on Friday, January 15 and Monday, January 19. Plus, watch a preview of Petersen's sit-down with Dr. Phil above! 

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