What is the impact of the Fourth Amendment on the privacy of sworn officers?

1990) (citation and internal quotation marks omitted), the government's interest in the integrity of its police force "may justify some intrusions on the privacy of police officers which the fourth amendment would not otherwise tolerate," Kirkpatrick v. City of Los Angeles, 803 F.2d 485, 489 (9th Cir. 1986); see also Biehunik v. Felicetta, 441 F.2d 228, 231 (2d Cir. 1971) ("The policeman's employment relationship by its nature implies that in certain aspects of his affairs, he does not have the full privacy and liberty from police officials that he would otherwise enjoy."). It was hardly unreasonable here to ask sworn officers to provide saliva samples for the sole purpose of demonstrating that DNA left at a crime scene was not the result of inadvertent contamination by on-duty public safety personnel.