Thread:BastionMonk/@comment-28675190-20160608003321/@comment-1259419-20160618191744

Well, there are many pieces of evidence. For example this Nature article: Tyrannosaurus rex hunted for live prey from 2013.

A pair of hadrosaur tail vertebrae found in 2007 (described by David Burnham et al in this article) has the tip of an adult Tyrannosaurus tooth embedded in the bone, with evidence of new bone growth that wrapped around the tooth. Burnham and his colleagues suggest that this Edmontosaur had also survived a Tyrannosaur attack and that this was further proof that Tyrannosaurus were predators.