I mean, she was arrested and imprisoned for blowing up multiple things including a semi truck, several stretches of road, and the factory at the end of 1, and everything illegal she did in between 1 & 2. Probably got some of the T-101s shenanigans pinned on her, too, since they were usually close together. (and in 2 they specify that the police believe they are connected but don't specify how)
She was imprisoned in a mental institution because she was claiming robots from the future sent a robot back in time to kill her unborn child she conceived with a future man said unborn son sent back in time to save her, and thus himself.

