MEXICO CITY —
The death of Hartley drew wide attention as it appeared Hartley and his wife, Tiffany, were on a personal trip when he was shot by Mexican criminals on Sept. 30, 2010. The Hartleys were using personal watercraft on Falcon Lake when David Hartley was shot in the head and fell into the water.
The navy is also blaming Martinez for the killing of the Tamaulipas state police commander and chief investigator on the case, an attack that hampered the investigation.
The navy said Martinez is also a suspect in dozens of killings of people who were buried in mass graves at the same site of the 2010 massacre of migrants. Nearly 200 bodies were discovered in April 2011 in the town of San Fernando, close to the U.S. border. Those two crimes have been the most fatalities since Mexico's federal government launched an armed offensive against drug traffickers in December 2006.