. >>> new details in the stabbing death of a hardware store clerk in el sebrante.s video shows a man police say they want to talk to. ktvu's john sasaki live now in our newsroom with how the man seen there on the video could help police answer one key question about the killing. >> reporter: the community is devastated and investigators are still trying to figure out what prompted the killer to commit this horrible crime. >> reporter: ace hardware in el sebrante was busy this afternoon. but it was clear to see the clouds were still looming over what happened two days ago. >> absolutely shock throughout the community. >> reporter: now there's a memorial for daniel stone. as he started his work way, stone was killed by someone who stabbed him 17 times. >> he had an incredible sense of humor, and was really, really just a nice nice man. >> reporter: 34-year-old damon agman was charged with the stabbing in the case. his arraignment was the scheduled for next week. >> but we're hoping that we may be able to locate him and see whether or not he may have witnessed some of