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.
de Menezes was held down by a different person than who shot him.
It said one policeman held him down and the other shot him. My statement is definitely correct. 
( z0 hold :ARG0 ( z1 person :ARG1-of ( z2 differ :ARG2 ( z3 person :ARG0-of ( z4 shoot :ARG2 ( z5 person :name ( z6 name :op "de" :op "Menezes" ) ) ) ) ) ) :ARG1 z5 :ARG3 ( z7 down ) )
(z0 / hold-01
    :ARG0 (z1 / person
              :ARG1-of (z2 / differ-02
                           :ARG2 (z3 / person
                                     :ARG0-of (z4 / shoot-01
                                                  :ARG2 (z5 / person
                                                            :name (z6 / name
                                                                      :op1 "de"
                                                                      :op2 "Menezes"))))))
    :ARG1 z5
    :ARG3 (z7 / down))
de Menezes was held down by a different person than who shot him .
z5 :name z6
z6 :op1 1
z6 :op2 0
z0 :ARG1 z5
z0 :ARG3 z7
z1 :ARG1-of z2
z0 :ARG0 z1
z2 :ARG2 z3
z3 :ARG0-of z4
z4 :ARG2 z5