She Was Convicted Years Ago of Killing Ex's Mother with Poison. What Does She Have to Say For Herself Now?

'Little Miss Innocent: Passion. Poison. Prison.' premiers Friday, Sept. 20 on Hulu

<p>ABC News</p> Kaitlyn Conley

ABC News

Kaitlyn Conley

Kaitlyn Conley, the New York woman who was convicted for her role in the fatal poisoning of her ex-boyfriend’s mother, is speaking out in a new docuseries.

The three-part Hulu docuseries, Little Miss Innocent: Passion. Poison. Prison, will feature Conley, a 31-year-old former receptionist who claims she has been wrongfully convicted of the 2015 killing of Mary Yoder, her former boss and the mother of her ex-boyfriend, Adam.

For the first time since her 2018 sentencing, Conley breaks her silence, staunchly maintaining her innocence while detailing her allegedly toxic relationship with Adam and offering her theories on who killed Mary, and why.

(An exclusive clip of the docuseries, which premieres Friday, Sept. 20, only on Hulu, is shown below.)

Prosecutors said Conley poisoned 60-year-old Yoder, for whom she had worked for four years, as revenge against Yoder’s son, Adam, the Post-Standard reported. Yoder, a Whitesboro, N.Y., chiropractor, died in July 2015.

Related: Receptionist Sentenced for Fatally Poisoning Ex-Boyfriend's Mom, Who Was Also Her Boss: Reports

According to the Post-Standard, authorities said Conley used colchicine — a medicine used to treat gout — to poison Yoder.

Conley had known Adam since 2011 and the two had dated off and on before Yoder’s death, according to the Utica Observer-Dispatch. But their relationship was turbulent, and Conley’s defense reportedly contended at trial that Adam was abusive and controlling.

Eannace Funeral Home Mary Yoder
Eannace Funeral Home Mary Yoder

Conley was found guilty of first-degree manslaughter in November 2017 after her second trial. Her first trial resulted in a hung jury. She was sentenced to 23 years in prison in 2018 and has maintained her innocence.

Want to keep up with the latest crime coverage? Sign up for PEOPLE's free True Crime newsletter for breaking crime news, ongoing trial coverage and details of intriguing unsolved cases.  

“With all respect to the justice system, I’m innocent,” Conley said at her sentencing in Oneida County, N.Y., court, The Post-Standard and local TV station WKTV reported.

The docuseries, produced by Plum Pictures and ABC News Studios, also features never-before-seen police interviews, exclusive audio recordings of Yoder on the day she was poisoned and a never-before-heard audio interview with the victim’s husband, Bill Yoder. It also represents the first time in seven years the Yoder family has gone public and the first time since their daughter’s conviction that Conley’s parents have spoken out.

Little Miss Innocent: Passion. Poison. Prison. begins streaming Friday, Sept. 20, only on Hulu.

For more People news, make sure to sign up for our newsletter!

Read the original article on People.