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

This week: A judge in the first Illinois trial over Roundup pesticide declared a mistrial on Dec. 6 after he found “serious misconduct” on the part of Monsanto. Tom Girardi’s lawyers say prison could kill him, but prosecutors want a 14-year sentence. Find out who TikTok’s parent company has turned to in latest string of cases over children’s privacy.