Based on the video, I can't conclude she was lying about that. It didn't sound like a police siren.
I think that if anything it shows that the police were lying about coming in clearly with sirens, it just sounds like a little car alarm blat.
I think the video shows her story to be more credible than the police.
Yeah, but she didn’t say, “I thought the siren was a car alarm.” She said, “there was no siren.” She also made up some weird nonsense about seeing people in her bushes. She’s not a credible witness. But even so, she’s not claiming they moved the body.