A huge lawsuit accuses nearly 20 big drug companies, a billionaire and two brothers-in-law of cozying up to hike drug prices. Here's the inside story.

Attorneys general for most U.S. states are bringing a large federal antitrust lawsuit against nearly 20 generic drugmakers, alleging they illegally collaborated to jack up drug prices. Business Insider is the first to report on the unredacted suit, which alleges frequent, close communications between employees of rival companies about how to increase prices.