Mexican authorities have detained a suspect in the 2010 Falcon Lake killing of David Hartley, CNN.com reported Monday.
According to the report, the suspect is Zetas drug cartel leader Salvador Alfonso Martinez Escobedo, known as "The Squirrel."
Mexico's Navy did not say why they think Martinez is connected to Hartley's killing.
Hartley's wife told police that she and her husband were on jet skis on Sept. 30, 2010, when they were ambushed by assailants who shot the victim in the head.
“We always have to be hopeful that this will move forward to him being prosecuted, David’s remains being found, and finding more closure," said Tiffany Hartley, David Hartley’s widow. "It’s hard to have that, but we’re hopeful.”
Martinez was detained last week and is also suspected of being behind the 2010 massacre of 72 migrants in the Mexican state of Tamaulipas.
The Mexican Navy also said that Martinez is responsible for graves found with more than 200 bodies in that state and the execution of more than 50 people in other parts of Mexico.