[x] "My tech person made a virus that'll make them arrest cops."
-[X] "Imagine the look on Stark's face. Man like that is all ego. You blow them up and he'll just make more to spite you... you make them look silly, and..."
It shouldn't be possible to reprogram the bots like this without Liv's tech powers, for basic security reasons, and Justine probably knows enough about infosec to guess that, but Liv's her personal hero so she'll probably go along with what we say anyways. This could be an elaborate con, but it doesn't seem very likely - if Liv's been busted, Stark would send a security team, not a teenager, and I don't see how anyone else would have found out.