WHAT DO YOU THINK ?

I had to call the police on my family about a serious death threat . I made an police report. At the time I made the police report I was in my room talking very low on the phone so no one could hear me. Another family member was in the room next to me.

Fast forward 2 days later the person that I made the report on questioned me and asked why I called the police on them. While she was questioning me my other family member that lives in the room next to came out and butted in the conversation as asked what are you talking about ? She said it twice and the person said someone lied on me to the police and then the other family said it wasn’t me and walked away.

What do you think ?

How would the person know I made a police report if I was talking in the corner of my room very low.