Liability for Death Caused By Rehabbed Home

[Scot Burns]

Scenario: You buy a house after it there was a death in it due to accidental fentanyl exposure. You get the house remediated by a hazmat service and the city gives it an "all-clear". You remodel the house and sell it. At some point down the line, one of the occupants is exposed to fentanyl (maybe through doing demo work) and dies. 

Question: For how long does the seller of the rehab house have liability for anything happening to a person in the house caused by drug exposure?