>> i just want to let you know, you're not under arrest, okay? >> reporter: detective ryan asked about the night of the murder. he used wendy's texts with sirius to refresh her memory. >> could you put it here so we both could see? >> oh, yeah. >> may 5th. >> reporter: did wendy's texts that night fit in the timeline they were building of brandy's murder? and did they speak to sirius' whereabouts? >> at 11 o'clock, when you type these, you were sure he was not in the house at 11:00? at 11:00, he was not at your how? >> he was not in my house then. >> reporter: sirius arrived, wendy said, after that 11:00 text. sirius had given the cops wendy as his alibi and she'd inadvertently only made him someone detectives needed to take a closer look it. there's a window of opportunity in there in which he could easily have done this crime? >> yes. >> reporter: and there was another thing. the squad's phone expert filled them in about some internet searches he'd found on sirius's device. >> sirius had opened every news article that had to do with the homicide. >> reporter: interesting,