‘Hell on wheels’ killer Mackenzie Shirilla claims ‘pre-existing medical condition’ may have caused her to black out during fatal wreck in latest appeal

Convicted “hell on wheels” killer Mackenzie Shirilla claimed in her second appeal that she suffers from a “pre-existing medical condition” that could be to blame for her blacking out before the horrific crash.

Shirilla’s last-ditch appeal, filed by her current attorneys with the Ohio Supreme Court on April 27, argued that her past defense team failed to investigate or back up the alleged pre-existing condition with expert testimony.

The 21-year-old murderer “suffered from a pre-existing medical condition that could have caused her to black out while driving,” her new lawyers wrote in the appeal, People reported.

Follow the latest updates on the ‘Hell on Wheels’ killer Mackenzie Shirilla:

The appeal comes after courts rejected her past petition for a bizarre, one-day filing delay that her legal team blames on a leap-year calendar miscalculation.

Shirilla, 21, is currently serving 15 years to life for the 2022 double murder of her boyfriend, Dominic Russo, and friend, Davion Flanagan.