You're exactly right, and I would almost almost feel better if this WAS a "brown or black thing" rather than a more corrupt and conspired effort to discredit someone who was merely a witness to the incident.
Side note where I worked we had a policy if you used profanity and someone reported it and the audio confirmed it first time you got a written warning and had to pull office hours (general crap work) second time unpaid suspension, third time fired.