The Florida lawyer who last year won financier Ron Perelman a $1.6 billion verdict in a suit against investment bank Morgan Stanley & Co. has set his sights on law firm Proskauer Rose.

John “Jack” Scarola of West Palm Beach’s Searcy Denney Scarola Barnhart & Shipley is representing two former Proskauer clients in two separate suits against the 715-lawyer New York firm. Both plaintiffs claim Proskauer breached its fiduciary duty to them, giving faulty advice that wound up costing them millions.