Game Theory Wife Murderer

Did any of you catch this murder story, regarding an economist from U Penn?

The professor is charged in the Dec. 22 slaying of his wife largely based on circumstantial evidence, his attorney says, while the affidavit shoots back with, "Dr. Robb lied to the police about an obvious motive for this murder, his knowledge of his wife's recent plans to divorce him and obtain a significant portion of his wealth."

I have seen the word "wealth" used in almost every news story. What's the story? Did he inherit the wealth? Or is U Penn paying a lot better than my college?