In the late 1960s and 1970s, New York City experienced escalating crime alongside residents’ growing frustration with the inability of municipal officials and the police to curtail it. These forces led a range of New Yorkers, from those in low-income neighborhoods to those in business districts, to sidestep the police and reimagine their responses to crime. Increasingly, everyday residents formed neighborhood patrols and hired guards, while businesses and institutions employed private security forces. These developments forged a new role for private actors in the patrolling of city streets. Over time, as resident patrols waned and as security guards proliferated, the private sector gained significant new capacities to surveil and police public space. Additionally, by formalizing a cooperative relationship with private security forces, the New York police and municipal authorities captured these private resources for the expansion of the carceral state.