Definition: Given a document, generate a short title of the document. The title should convey the main idea/event/topic about which the document is being written. Note that URLs in the text have been replaced with [Link].
Input: The lawsuit by Washington Attorney General Bob Ferguson accused Purdue of deceptive marketing of OxyContin and convincing doctors and the public that its drugs had a low-risk of addiction and were effective for treating chronic pain.
"I don't know how executives at Purdue sleep at night " Ferguson told reporters.
In filing his lawsuit in King County Superior Court in Seattle on Thursday   Ferguson  said he was breaking off from an ongoing multi-state probe by various attorneys general into companies that manufacture and distribute opioids.
While  Ferguson  said looked forward to seeing its results  "we felt we had a case ready to go."

Washington State Sues OxyContin Maker Purdue Pharma