Rodriguez was spotted by a witness running away from the stairwell where the backpack was found seconds before it went off.
Rodriguez was not casually walking away from the stairwell.
( z1 walk :polarity - :ARG0 ( z2 person :name ( z3 name :op "Rodriguez" ) ) :ARG2 ( z4 away :op ( z5 stairwell ) ) :manner ( z6 casual ) )