i love you sweetheart, drive safe. have a good night. >> angela was nervous, he said. afraid to be left alone. >> why did he say she was anxious that night? >> the night before, she said, that she heard somebody messing around at the front door of the residents. she felt like she was being watched. >> so, said chris, he called and texted her repeatedly. but after 2 am, he said, she did not pick up when he called. >> and he figured that she had fallen asleep. >> but no, she was not sleeping. but who killed her? and why? when chris first arrived at the police station, they let him make a phone call. it was obvious, he had his own suspect in mind. >> richie is probably be piece of -- who did it. god, i hope they piece it to him. i hope so. >> richie? who was he. >> a pregnant young mom, dad. toddler nearby. an investigation about to lead