A report was published as the result of a joint project by the Electronic Frontier Foundation (EFF) together with the the Center for Just Journalism (CJJ), and IPVM.
EFF announced the report in the article New Report Helps Journalists Dig Deeper Into Police Surveillance Technology:

A new report released today offers journalists tips on cutting through the sales hype about police surveillance technology and report accurately on costs, benefits, privacy, and accountability as these invasive and often ineffective tools come to communities across the nation. (…)

Police technology is often sold as a silver bullet: a way to modernize departments, make communities safer, and eliminate human bias from policing with algorithmic objectivity. Behind the slick marketing is a sprawling, under-scrutinized industry that relies on manufacturing the appearance of effectiveness, not measuring it. The cost of blindly deferring to advertising can be high in tax dollars, privacy, and civil liberties. 

The report ‘Selling Safety’ is found on this page.
The report might also be useful for those looking at the financial surveillance practices that are promoted in the privatisation of governmental tasks to companies (especially banks) in anti-money laundering and countering the financing of terrorism legislation.