It's not the clothes that make the cop. Swedish police officer Mikaela Kellner was sunbathing in Stockholm with friends, including another off-duty female cop, when a homeless man approached them selling newspapers. According to Aol.News:
As the man lingered, Kellner grew suspicious. Her suspicions were confirmed just as he started to walk away when her friend noticed her cell phone was missing.
The bikini-clad cop then ran 15 meters, tackled the man and held him down until fellow on-duty officers were arrived to make the arrest.
Kellner says that in her 11 years of being a cop, it's the first time she's made an arrest while wearing a bikini, but says she'd go further than that. She would have arrested the thief even if she'd been naked.