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 unusually murky waters. Criminal is a proud member of Radiotopia from PRX. Talk to us on Twitter @criminalshow. Sign up for our occasional newsletter, The Accomplice. If you'd like a 2016 Criminal Calendar or set of postcards featuring artwork and quotes from our favorite episodes, visit our shop. Thanks very much for supporting the show and have a happy New Year. We'll be back January 8th.