John Martin and Mike Sullivan, two half-brothers from Florida, have made a name for themselves using sonar technology to locate submerged vehicles and help solve cold case mysteries throughout the Sunshine State.
John Martin and Mike Sullivan, two half-brothers from Florida, have made a name for themselves using sonar technology to locate submerged vehicles and help solve cold case mysteries throughout the Sunshine State.
In an exclusive interview with Dailymail.com, Sunshine State Sonar founder, Mike Sullivan, sheds light on the danger involved in their incredible work as they scour Florida s waterways.
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