New York Attorney General Letitia James’ office has begun issuing subpoenas to financial institutions connected to the Sackler family in an effort to track the fortune they allegedly made by peddling addictive painkillers.

The subpoenas target holding companies, Wall Street firms and individuals that the Sacklers allegedly transferred billions of dollars to, according to court papers.

The Sacklers, who own Purdue Pharma, made a fortune selling OxyContin to doctors while allegedly downplaying its addictive quality, prosecutors allege.

The Sacklers’ tactics have come under scrutiny in recent years because of the opioid epidemic that has killed hundreds of thousands of Americans.

As New York and other states began legal action against the Purdue Pharma, prosecutors allege they used holding companies and other business entities to siphon money out of the company to guard the cash from litigation.

“The opioid epidemic has ravaged American communities for over a decade, while a single family has made billions profiting from death and destruction,” James said in a statement Thursday.

“From the day we filed this complaint, we said the Sackler family would be held responsible for their actions hooking our nation on OxyContin. We won’t let up until we have delivered justice,” she added.

Lawyers for the Sackler family did not immediately return request for comment.