I can't do much better than that. Unfortunately, there were no videographers present at the raid. Two people did go to the hospital because of the pepper spray, however, and have hospital records to prove it. Active Resistance is fully documenting the raid by getting eyewitness accounts and acquiring copies of the injured parties' hospital records. They hope to soon be able to visually identify the raiding police officers.
Police deny that the raid ever happened.
No matter how cynical I may be, I have a very, very hard time believing that my friends pepper sprayed themselves to the point of hospitalization just for effect. In addition to my having seen most of the arrests personally, CounterMedia has video documentation of almost every arrest and incident. If you don't believe me that police were arresting videographers without reason, this is the sort of information that may help to convince you. So far the police haven't given any real explanation as to why they made all of these arrests, though CounterMedia and Active Resistance keep begging them for one. In Friday's Chicago Tribune the police said they arrested demonstrators at the Festival of the Oppressed for holding an unpermitted march and that they arrested videographers because they had forged press passes and therefore the police could not tell them from the demonstrators.