(NewsNation) — Ellen Greenberg was found dead in 2011 with 20 stab wounds, but her death was ruled a suicide.

Her body was discovered by Samuel Goldberg, who told police he kicked open the apartment door after returning home from the gym. Once inside, Goldberg said, he found his fiancée in the kitchen, leaning against a cabinet with a knife in her chest and 20 stab wounds. Greenberg suffered stab wounds to her torso, back and head.

Ellen Greenberg’s friend Alyson Stern exclusively told NewsNation’s Brian Entin on Thursday that she doesn’t believe Samuel’s story.

“I knew it wasn’t suicide,” Stern said on “Banfield.” … “I knew what he (Samuel) had told me, and I knew who Ellen was. But (police) had no interest in hearing from me.”

Parents of stabbed teacher question investigation

Greenberg‘s parents also aren’t convinced their daughter’s death was a suicide, and they’ve since won the right to challenge that ruling.

The family consulted two experts, one of whom determined that a stab wound to her brain would have resulted in “severe pain, cranial nerve disfunction and traumatic brain signs,” as well as “numbness, tingling (and) irregular heartbeat.”

That conclusion went against the findings in the medical examiner’s report, which determined that there was no damage to the spinal cord. But the Philadelphia Inquirer reported in 2019 that neuropathologist Dr. Lucy Rorke-Adams said she had no recollection of the case, despite being the doctor cited in the medical examiner’s report.

When Gov. Josh Shapiro was reportedly asked to review the case as attorney general, his office stood by the ruling. Greenberg’s parents fear Shapiro never took the case seriously.

“I think he (Shapiro) tried to keep his hands off it as much as possible. I think deep down, he knew this was a hot potato,” Josh Greenberg said. NewsNation has reached out to Shapiro’s office, but has yet to hear back.

NewsNation’s Tyler Warnell contributed to this report.