Sgt. David Mascarenas was the Dive Supervisor for the Los Angeles Police Department. He’s been diving his whole life, and prides himself on never refusing a dive, no matter how treacherous. At least until the summer of 2013, when a murder investigation led him into the unusually murky waters of the La Brea tar pits. We first spoke with Sgt. Mascarenas in 2015. This week, we’re adding to the story, with information about the crime he couldn't tell us before. Criminal is a proud member of Radiotopia from PRX. If you haven't already, please review us on Apple Podcasts! It's an important way to help new listeners discover the show: iTunes.com/CriminalShow. Say hello on Twitter, Facebook and Instagram. Sign up for our newsletter, The Accomplice. If you'd like to introduce friends or family members to podcasts, we created a How to Listen guide based on frequently asked questions. Artwork by Julienne Alexander. Sponsors: Article Get $50 off your first order of $100 or more at Article.com/criminal Better Help Get 10 percent off your first month with discount code criminal at BetterHelp.com/criminal Quip Go to GetQuip.com/Criminal right now and get your first refill pack FREE with a QUIP electric toothbrush. Rothy’s Go to Rothys.com/CRIMINAL to get your new favorite flats. Simplisafe Protect your home today and get free shipping at SimpliSafe.com/CRIMINAL Squarespace Try Squarespace.com/criminal for a free trial and when you’re ready to launch, use the offer code CRIMINAL to save 10% off your first purchase of a website or domain. Sun Basket Go to sunbasket.com/criminal and enter promo code criminal at checkout for $35 off your order. Third Love Go to thirdlove.com/criminal now to find your perfect-fitting bra… and get 15% off your first purchase! Virtue Labs Visit VirtueLabs.com and use the code Criminal to receive 20% off plus free shipping on your Virtue order. ZipRecruiter Try ZipRecruiter for free at ZipRecruiter.com/criminal