Investigators are probing the case of the one-legged woman who was run over by 11 trains on the N tracks after falling between the cars. Arabell Lin's fall triggered the emergency switch, but the operator started the train up again after failing to find anything that flipped the switch. The 12-year veteran allegedly had two rules violations in the past 10 years. The MTA wouldn't say what they were, but admitted the operator didn't look long enough. Operators of 10 other trains failed to see Lin's body as well, leaving her body so mangled that cops relied on missing persons reports to identify her.