Rescuers Hope Harmonica Music Helps Find Missing Man His dog, also missing, is familiar with the sound By Kevin Spak, Newser Staff Posted Jun 20, 2014 3:50 PM CDT Updated Jun 20, 2014 4:19 PM CDT 12 comments Comments Los Padres National Forest in California. (Shutterstock) (Newser) – Rescue crews in Southern California are using tools of the high- and low-tech variety in their increasingly desperate search for missing firefighter Mike Herdman. The 34-year-old was on camping trip deep in Los Padres National Forest with a friend last Friday when his dog, a 50-pound Vizsla named Duke, ran off. Herdman, who was barefoot and wearing only a T-shirt and shorts, ran after him and never returned, NBC 4 reports. Rescuers are now using two kinds of drones to scan the mountains with infrared cameras, ABC News reports. Their other secret weapon? Harmonicas. Search crews spotted a dog they believe to be Duke on Wednesday and again yesterday, but he ran off each time, reports the Pasadena Star News. They're hoping harmonica music will put the dog at ease, because Herdman's daughter gets Duke's attention that way, notes the LA Times. Their hope is that if they catch Duke, he could lead them back to Herdman. In a sign of how tough this terrain is, one searcher is in the ICU after getting bit by a rattlesnake.