Prosecutors in three Southern California counties have charged more than 13,000 people under Proposition 36 , the tougher-on-crime law passed overwhelmingly a year ago this week, according to data collected by the Southern California News Group.

The law placed stricter punishments on repeat drug and theft offenders, but also promised to provide those with addictions and mental illness an option to have cases dismissed by completing a court-approved treatment program instead.

While the bulk of the cases filed in Los Angeles, Orange and Riverside counties — nearly 8,500 — fall under the “Treatment-Mandated Felony Act” created by Prop. 36, few lead to treatment and even fewer end in the dismissal of charges, according to figures provided by the counties and a recent report by the Judicial

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