this man, 19-year-old joseph beltran, was charged with murder yesterday. officers found him on wednesday. detectives say he stabbed 20- year-old demetrius campbell after an argument late on the night of may 4. campbell was pronounced dead a half hour later. >>> the two san francisco firefighters laid to rest yesterday are being remembered as friends, brothers, and role models. thousands of people gathered at st. mary's cathedral yesterday to say good-bye to lieutenant vince perez, and firefighter- paramedic tony valerio. they of course died last week battling a house fire. during the funeral, family and friends shared their recollections. >> my brother and vinny died doing what made him come alive. he got a great deal of joy and fulfillment from being a man of service. >> we were buddies off the job as well. we volunteered at the free clinic rock medicine division on the overdose team so we could get into rock concerts for free. >> the funeral brought out dignitaries, including mayor ed lee, governor jerry brown, and congresswoman nancy pelosi. 5000 unifor