With his back to the wall in an alleged pump-and-dump scheme, LA financier Morrie Tobin offered a tip that would turn into the biggest college-admissions fraud ever prosecuted, then wore a wire to help bring down the cheats. In a bid for mercy, the Yale grad told investigators that Rudolph “Rudy” Meredith, the head women’s soccer coach at the Ivy League school, solicited $450,000 from him in exchange for recommending Tobin’s daughter for admission as an athletic recruit, a source told the Journal. Tobin agreed to wear a wire during a meeting in a Boston hotel room with Meredith —...