Is a police officer entitled to qualified immunity in a false arrest claim?

In false arrest claims, an officer is entitled to qualified immunity if he or she "reasonably but mistakenly conclude[s] that probable cause is present." Hunter v. Bryant, 502 U.S. 224, 227 (1991) (internal quotations omitted). Probable cause to arrest existed if "at the moment the arrest was made...the facts and circumstances within [the officer's] knowledge and of which they had reasonably trustworthy information were sufficient to warrant a prudent" officer in believing the arrestee had committed a crime. Id. at 228 (internal quotations omitted).