[3] Cassell subsequently distanced himself from this documentary, claiming that it contained multiple factual, scientific, and ethical errors.
[4] He has served as a sniper, an anti-piracy consultant and a Counterterrorism Combat Dive Instructor for Special Ops personnel.
Sea Wolves uses Special Ops techniques on "rECOn missions" to identify the killers of marine endangered species.
Cassell planned to swim a distance of 30 miles, from Santa Catalina Island to San Pedro Harbor, during one continuous scuba dive while conducting experiments related to the decline in shark populations.
[10][11][12] He suffered a near-fatal equipment failure, forcing him to surface and give up the record attempt, but completed the dive after correcting the technical problems.