Joseph Proctor , 32 , was killed at a military checkpoint in Guerrero state . There are conflicting reports as to whether the man fired at the military first . The Mexican government has said that it is investigating and will take appropriate action against those responsible for his death.
Joseph Proctor , 32 , was killed at a military checkpoint in Guerrero state . There are conflicting reports as to whether the man fired at the military first . A woman who identified herself as Proctor 's mother said she did not know how he died .