herself caught in the undertow of a homicide investigation. cops had her downtown the same day as sirius. i just wanna 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 eleven o clock, he was not at your house. he was not in my house then. reporter: sirius arrived, wendy said, after that eleven o clock 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 th