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

This week: A top in-house lawyer at Johnson & Johnson testified on Monday at a talcum powder hearing about “the most egregious breach of ethical obligations I have ever seen.” A federal judge overseeing the paraquat multidistrict litigation found a “significant number of plaintiffs” could not allege exposure. Find out who Apple retained in an antitrust class action over iCloud.