Video camera was placed in private home without permission; should I file a police report?

I recently found out that my a sibling placed video camera inside our parents garage without their knowledge/permission & streamed video to their personal computer through a wireless router that I found hidden. Father recently died & sibling is not happy about who controls estate. Upon search I only found hidden wireless router {took picture} but no video camera. The broadband service is being billed to my mother who does not use a computer. Is this legal & if router was removed can streamed video still be traced or can wireless provider be used to trace streamed video? Thanks!