Why Unregulated Gun Sales Flourish Online Listen Download Embed Share Share this on Facebook (Opens in a new window) Share this on Twitter (Opens in a new window) Share this via Email Boston police officer Kurt Stokinger, front, sued an online marketplace where the gun used to shoot him was sold in 2018. ( AP Photo/Steven Senne ) Produced by Andres O'Hara Produced by GBH and PRI