Long before Purdue Pharma filed for bankruptcy, before the series’ “Dopesick” and “Painkiller” brought the Sackler family and devastation of the opioid crisis into Americans’ living rooms, and before her son died of a drug overdose at the age of 33, Ellen Isaacs was sounding the alarm about the opioid epidemic.

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On Monday, Isaacs is set to return to Washington as part of her efforts to fight the bankruptcy plan and, specifically, the decision to release the Sacklers from civil liability for the opioid epidemic. The matter is under review by the Supreme Court, with oral arguments in the case, known as Harrington v. Purdue Pharma L.P., set for Monday morning.

“It’s really important to me that these people get held accountable for all the people that they’ve murdered,” Isaacs told CBS News. “They’re criminals and they needed to be treated as such.”