Officers and EMTs were called to the park for a report of a disturbed person. While trying to approach 20-year-old Joshua Ehrenberg, sources tell Fox 5 that other protesters locked their arms and legs to stop Ehrenberg from being loaded into an ambulance.

Police say that during the ensuing moments, Ehrenberg shoved a emergency worker. That EMT then had a ladder fall on top of him, and then several other protesters fell on top of the ladder, crushing his leg. Sources say the ladder was set up as a part of the OWS protest.