Parts of 26-year-old Brandy Odom's dismembered body were found in a Brooklyn park over two years ago.<br />Now, Newser reports prosecutors now have a theory in the notorious and grisly unsolved murder.<br />Last week, Odom's roommates—Cory Martin, 33, and Adelle Anderson, 32—were charged with federal wire fraud and identity theft crime.<br />What's more, prosecutors say text messages and YouTube searches have led them to believe Martin killed Odom. They say further charges may come.<br />Martin bought a reciprocating saw from Home Depot, then performed YouTube searches on 'how to insert blade for reciprocating saw.'<br />Prosecutors believe Martin killed Odom so that he and Anderson could collect on two life insurance payouts, totaling $200,000.