Plot summary
Wayne Kruger ( David Alan Basche ) is the owner of a company known as Lifetrace, which specializes in revealing members' privacy on their profile pages and selling it to various organizations. Reese, Finch, and Shaw monitor Kruger's activities in the company, which is currently making a deal with another large retail company called Riverton. Though the site is deemed harmless by Kruger, Finch discovers that there is a class-action suit against Kruger involving various victims of the site whose privacy has been eliminated. Members of the suit receive anonymous packages containing information on how to humiliate and attack Kruger in revenge for their lives being destroyed thanks to Lifetrace.
One of these people is Stu Sommers, a man whose daughter was stalked and killed by her ex-boyfriend after he used Lifetrace to follow her. Reese convinces Sommers not to kill Kruger before being shot at by Collier, a man supposedly working for Riverton. Collier also kills Kruger before fleeing the scene. He was the one who sent the anonymous packages.
Credits
Adapted from Wikipedia contributors, Person of Interest season 3. HTML formatting and reference markers removed.