Robert Downey Jr. will not face criminal charges in connection with his April 24 arrest, despite forensic tests showing that he had cocaine in his system, prosecutors said on Monday. A spokeswoman for the L.A. County District Attorney said that the troubled actor’s latest run-in with the law would be handled by state corrections officials, and a spokesman for that office said that the conditions of Downey’s parole would be tightened but that officials were not planning to put him behind bars again. Downey, 36, remains on parole from a one-year prison stay that ended last August on a previous conviction for cocaine possession. After his most recent arrest, he checked himself into a drug rehab center. The “Ally McBeal” star still faces a court hearing later this month stemming from his Thanksgiving weekend arrest in his Palm Springs hotel room, for which he is charged with felony possession of cocaine and the prescription drug Valium. A conviction could result in a prison term of up to four years and eight months.