"A day after mishandling two punt returns, 49ers wide receiver Kyle Williams handled the disturbing fallout from his season-killing fumbles in the NFC Championship Game flawlessly.

Williams received death threats via Twitter in the hours after his fumbles in the fourth quarter and overtime led to the Giants' final 10 points in their 20-17 overtime win Sunday night at Candlestick Park.

On Monday morning, as he met with reporters for the second time in 16 hours, Williams, 23, said he wasn't aware of the vitriolic postings on Twitter and had leaned on teammates, friends and family for support. He repeatedly expressed his desire to be accountable for the mistakes that might have cost the Niners their first trip to the Super Bowl in 17 years. "