Police were on to killer quicklyInvestigators say first few days key to cracking case By Kristen Green STAFF WRITERSeptember 18, 2002 San Diego police detectives who investigated Danielle van Dam's kidnapping said if it had taken a day or two longer to identify David Westerfield as a suspect, it's likely the case would have ended differently. "If we hadn't homed in on him so quickly, it would have given him a little more time to think up better stories, do some more cleaning," Lt. Jim Collins said. More importantly, police might never have found his green sport jacket stained with...