That's not exactly what happened.
Aaron committed suicide before his case went to trial, and so he was never convicted let alone sentenced. 35 years was never even likely; had it gone to trial there's every reason to think he'd have been acquitted outright, or at worst given a slap on the wrist. Not that he should have even been charged, of course.
The building manager should (and may be legally required to) have a fire department approved emergency plan that specifically addresses this question. Usually, the plan will be for you to await rescue.
A modern, up-to-code high rise building will have designated "places of refuge" that are designed to withstand heat and smoke, such as a pressurized stairwell with fire doors. In older buildings that don't have something like that, the plan might call for disabled people to go to the nearest (unprotected) stairway, or it might call for them to remain in their office/apartment and "defend in place". If possible, call 911 (or equivalent) to notify rescuers of your location.