Said murderer who gets away was Roni Evers, and what makes Rita’s unheroic moment at least a bit more understandable is that Roni has a complicated relationship with Vic Stone a.k.a.
When Rita was in the military, an IED explosion left her nearly dead, but experimental procedures were used to keep her alive, and then she was used by Quorum, a top secret government agency, to carry out black ops.
Uncovering this dark history created tension between her and Vic after they first came together, but Vic was drawn closer to her after discovering that her internal tech was designed by S.T.A.R. Labs and Caulder Robotics – the lab Vic’s father works for, and the company owned by Niles Caulder.