>> yeah. >> reporter: the victim's name was lynn schockner. she was 50 years old. when they found her lying quite dead just outside her own back door, they could clearly see the bright red gash across her throat. how was it possible? the policemen were just outside her front door. and more cops were in alert mode out in the alley. but the only apparent witness to the silent murder of lynn schockner was lynn's little dog, zoey. horrified officers found her lying by lynn's side. her white coat spattered red. back at police headquarters, long beach cops, like undercover man chris nelson, heard the chatter. >> we were sitting in the office and we used to have a police radio on in the office listening to what's going on in the street. >> reporter: this was bad. >> we were right down the hall from homicide. and you knew right away this turned into a call out. you know, where somebody got