The only strawman here is the one you just created to shoot down. I'm not claiming to know what happened. I'm just pointing out a potentially suspicious aspect of this otherwise incredibly mundane story.
Supposedly Mark Cuban asked another investor to hold off on contacting the police while he personally investigated. Later, at some point, someone contacted the FBI. That's all we know. When the FBI takes on a completely trivial case and the victim is a billionaire I get suspicious. That is all I have said and all I believe.