In the April 14 episode of Last Week Tonight, John Oliver says this (emphasis mine):
For legal reasons I have to tell you that the Sacklers and Purdue insist the family didn't cause the opioid crisis and vigorously deny the claims in the lawsuits we've mentioned...
What does he mean by this? Is there some sort of regulation that the show would have to say what the Sacklers are defending themselves with? If so, what is it?