We report two cases of spine injury following a low-energy trauma in persons with ankylosing spondylitis (AS) and discuss the forensic considerations. A 60-year-old man presented with a wide anterior fracture of the superior endplate of T8 after an accidental fall down three wooden steps. A 93-year-old man presented with disjunction between C6 and C7 and 90-degree spinal angulation after a fall from a standing height or a fall from a bed. Post-mortem multislice computed tomography (MSCT) was performed before autopsy in both the cases. MSCT and autopsy findings were in agreement with a past medical history of AS. A spine injury occurring after a low-energy trauma is unusual and could be suspicious. In the forensic literature we found only a single case, which concerned multiple spinal fractures after a fall from a bicycle at low speed. Such specific mechanisms must be studied and known to the forensic expert. In this context, MSCT is a useful tool to investigate the spine and knowledge of the victim's entire past medical history is essential.