To be fair, this was probably just a matter of phrasing on his part. Instead of using the word "assume" (triggering a pithy response) he should have stated thi

To be fair, this was probably just a matter of phrasing on his part. Instead of using the word "assume" (triggering a pithy response) he should have stated this: If the man the police have arrested is indeed Dzhokhar Tsarnaev, the man implicated in the bombings...