fed-exed kirk a demand to pay close to $4,000 in expenses for the kids or else. >> she was giving him five days to pay it or she was going to take him back to court. >> oh, office manager ina said pam told her she was truly afraid of kirk. >> i just warned her, she worked late at night, make sure she went out the front door where all the lights were on and make sure that she was always cautious. >> money. the root of all evil? something else they found, what was that tell-tale residue in kirk's car? it was enough. on a summer morning eight months after pam zimmerman's death, a cop turned on his squad car lights and sirens, pulled over a motorist, read him, his rights, kirk zimmerman was under arrest for murder. >> coming up. >> greed, hate, murder.