Welcome to Law.com Class Actions: Critical Mass, a weekly briefing for class action and mass tort attorneys. Marriott filed an opening brief before the Fourth Circuit seeking to reverse a ruling granting class certification in cases over its 2018 data breach. A Sept. 21 auction of Tom Girardi’s belongings had some unusual items, like letters from Santa and a $2,200 Pokemon card. Find out which law firms filed the first lawsuit over water contamination in Jackson, Mississippi.

I’m Amanda Bronstad. Feel free to reach out to me with your input. My email is [email protected], or follow me on Twitter: @abronstadlaw.

Marriott International Inc. Credits: Bloomberg.

‘Consequential’ Data Breach Ruling Against Marriott Now On Appeal