New Mass Incarceration: The Whole Pie report shows effects of Trump’s immigrant detention campaign on incarceration numbers The increase in the number of people behind bars since last year's report is almost entirely attributable to immigration enforcement.

Can it really be true that most people in jail are legally innocent? How much of mass incarceration is a result of the war on drugs, or the profit motives of private prisons? Have popular reforms really triggered a crime wave? These simple, common questions are harder to answer than you might expect. The various government agencies involved in the criminal legal system collect a lot of data, but very little is designed to help policymakers or the public understand what’s going on. The uncertainty that results muddies the waters around our society’s use of incarceration, giving lawmakers and lobbyists the opportunity to advance harmful policies that do not make us safe. As criminal legal system reforms become increasingly central to political debate — and are even scapegoated to resurrect old, ineffective “tough on crime” policies — it’s more important than ever that we get the facts straight and understand the big picture.

Further complicating matters is the fact that the U.S. doesn’t have one criminal legal system; instead, we have thousands of federal, state, local, and tribal systems. Together, these systems hold nearly 2 million people in 1,566 state prisons, 98 federal prisons, 3,116 local jails, 1,277 juvenile correctional facilities, 220 immigration detention facilities, and 77 Indian country jails, as well as in military prisons, civil commitment centers, state psychiatric hospitals, and prisons in the U.S. territories — at a system-wide cost of at least $445 billion each year. 

The full report is available from Prison Policy Initiative here.