These books can help give you background information on the criminal law system as well as provide legal support for your paper. Most of these are available online, a few are in print in the library.
ABA Standards for Criminal Justice Dual Jurisdiction Youth, Fourth Edition
Can They Do That? Understanding Prosecutorial Discretion by 
The Imagined Juror by 
Locked In: the true causes of mass incarceration--and how to achieve real reform by 
Manifesting Justice by 
Mass Incarceration Nation by 
The New Jim Crow: Mass Incarceration in the Age of Colorblindness by 
Private Criminal Justice by 
Progressive Prosecution: race and reform in criminal justice by 
Unreasonable: Black Lives, Police Power, and the Fourth Amendment by 
