Opposed by Mayor Gavin Newsom, this measure would prohibit the police department from investigating or prosecuting people involved in the world's oldest profession. It would also prevent the city from using grant money designated to prosecute illegal immigrants involved in prostitution. Supporters say the law change would free up millions of dollars and help protect women by making them more likely to report abuse. Opponents fear the sex trade in San Francisco would balloon, luring pimps and sex traffickers to the city.