Christopher Walsh caught a picture of Maria Hill leaving the S.H.I.E.L.D.
He then joined H.A.M.M.E.R. and intercepted an e-mail sent by Tony Stark to Maria Hill.
Christopher M. Walsh later located Stark's location through the activation of the armor's repulsor battery and immediately reported this to Norman Osborn.
Walsh then tried to mislead Osborn, but he was caught and arrested by his supervisor.