When a rape is reported, the victim is medically examined, and the biological evidence acquired in that exam is called a "rape kit." That rape kit is used by prosecutors who try to bring the perpetrator to justice.
At least that's what is supposed to happen. But in many cases, it doesn't. Last month, a state audit found that half of all rape kits at the Oakland Police Department were never analyzed. Rape kit backlogs, it turns out, are plaguing the state. In Alameda County alone, the audit found close to 2,000 untested kits, dating back to 2001.