Once on the train (according to what the channel said was a leaked police statement, aired Tuesday night) a police officer pinned de Menezes down when another officer shot him.
Menezes was fatally shot by a police officer
( z1 shoot :ARG0 ( z2 officer :mod ( z3 police ) ) :ARG1 ( z4 person :name ( z5 name :op "Menezes" ) ) :manner ( z6 fatal ) )