A year-long investigation by CNN and the Center for Investigative Reporting finds the drug Medi-Cal program in California, paid with state and federal money, is rife with fraud, allowing rehab centers to stay open despite serious problems. Former clients say that, as teens, they were taken in vans from group homes to rehab even though they had no drug problem.

For an in depth look at part two of "Rehab Racket," check out the full report on CNN.com.

CNN's Drew Griffin and California State Senator Ted Lieu discuss the results of the investigation.