"He lived in an apartment building, and I killed him so brutally that it was obvious at first glance that it was a murder and not an accident. I could have run away, and the cops would have never found any clue.
But… Siesta saw me. Turns out she followed in her car to give me my phone which I had left there. And… she saw me flying and recorded everything on her phone.
She then entered the apartment building and came to the apartment I was in. She saw the dead body, but her reaction wasn't as I expected. She didn't seem shocked or surprised. She just gave me my phone back and asked me to leave.
However, since Siesta had entered through the apartment building, she was recorded on the CCTV. If the cops had found the body, Siesta could have been suspected.