The Patriots don't have many weaknesses, but one issue that has been lingering for years is the lack of confidence in the secondary. New England re-signed corner Aqib Talib in the offseason to a one-year deal, but they obviously do not get much security in that signing.
Alfonzo Dennard appears to be gone after being found guilty of assaulting a police officer. Even if Dennard somehow avoids the slammer, he's likely to be suspended by the league for his conduct.
Last season, Trufant showed his elite cover skills for the Washington Huskies, putting him third on many big boards in his position behind Dee Milliner and Xavier Rhodes.
At 6'0 and 190 pounds, Trufant has solid size and can help out in run support (he had 31 tackles for the Huskies in 2012), something the Patriots don't get much of right now with their current corners. If Trufant is one the board at this point in the draft, he makes way too much sense not to be taken by New England.