This death came just hours after the Navy arrested a high-ranking Zeta member in Nuevo Laredo , Tamaulipas , Salvador Alfonso Martínez Escobedo . The suspect , known by his code name , " La Ardilla " ( ' The Squirrel ' ) , was linked to two massacres in northeastern Mexico : the mass murder of 72 migrants in 2010 and the mass graves with more than 200 people in 2011 ; he is also believed to be responsible for two massive jail breaks , and for the assassination of David Hartley , a U.S. citizen , in Falcon Lake near the U.S-Mexico border on 30 September 2010 . Martínez Escobedo knew Lazcano personally and made him the godfather of his 2010 wedding ; he helped the authorities identify the corpse of Lazcano , although it is unclear if he did it through the photographs or in person
mass murder of 72 migrants
2010 San Fernando massacre
Heriberto Lazcano Lazcano