Private donors including big-box stores, fossil fuel companies, and tech giants are secretly giving hundreds of millions of dollars annually to law enforcement agencies and related foundations, allowing police to buy specialized weapons and technology with little public oversight. Experts say this huge deluge of police "dark money" funding, detailed in a new University of Chicago working paper ... leaves law enforcement beholden to the companies and powerful donors bankrolling them, rather than the communities that officers are sworn to serve. The study, which analyzed a database of nonprofit tax returns, found that from 2014 to 2019, more than 600 private donors and organizations collectively funneled $461 million to police and to other nonprofits supporting police. The Baltimore Police Department for years used private money to fund a secret aerial surveillance program that could track the locations of people throughout the city in real time. The program ... was eventually ruled unconstitutional in court. In Los Angeles, the city's police department used money from Target ... routed through a local police foundation " to purchase software from Palantir, venture capitalist Peter Thiel's data analytics company, that provides police massive amounts of sensitive data and purports to identify crime "hot spots." For the most part, the millions in dark-money funding that police agencies receive each year is perfectly legal. There are largely no laws or policies governing foundation donations to the police.