Sgt. David Mascarenas is 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.Say hello on Twitter, Facebook and Instagram. Sign up for our occasional newsletter, The Accomplice. Follow the show and review us on Apple Podcasts: iTunes.com/CriminalShow.We also make This is Love and Phoebe Reads a Mystery.Artwork by Julienne Alexander. Check out our online shop. Episode transcripts are posted on our website.Learn more about your ad choices. Visit podcastchoices.com/adchoices