Welcome to Law.com Class Actions: Critical Mass, a weekly briefing for class action and mass tort attorneys.

This week: A New Jersey appeals court overturned a $223 million talc verdict against Johnson & Johnson based on the plaintiffs’ experts. The maker of the Onewheel, recalled on Sept. 29, faces dozens of lawsuits brought on behalf of riders who were injured or died on the electric skateboard. Find out who replaced the Skadden, Arps, Slate, Meagher & Flom criminal defense team representing ex-Girardi Keese bookkeeper Christopher Kamon.