Father of stabbed Dodgers fan calls for witnesses - Article Photos 5/14

Rob Preece Jr. and Diana Haro, brother and mother of fatally stabbed Los Angeles Dodgers fan Jonathan Denver, listen during a public plea for witnesses to Wednesday's stabbing, during a news conference outside AT&T Park before the Giants' baseball game in San Francisco, Sunday, Sept. 29, 2013. Denver, 24, was fatally stabbed following a Dodgers-Giants game. (AP Photo/Tony Avelar)