Brazil police eye top crime faction after brazen murder at São Paulo airport

Killing of Antonio Vinicius Lopes Gritzbach, 38, former First Capital Command member, spawns number of theories

Police investigating a brazen murder at the arrivals area of Brazil's main airport are pursuing at least three lines of inquiry in their attempt to track down the killers - and the possible masterminds of the shocking crime.

Antonio Vinicius Lopes Gritzbach, 38, was leaving Sao Paulo international airport on Friday afternoon when two hooded men jumped out of a car and fired a hail of bullets. The brazen attack, captured on security cameras, marked a dramatic escalation of criminal violence in the country.