Jackson asks federal drug agents to probe seven other doctors , one nurse . Investigators did not find sufficient evidence to recommend criminal prosecution of any of the medical practitioners , said Christine Gasparac , a spokeswoman for Attorney General Jerry Brown . One doctor referred to medical care . Attorney General : No evidence to support criminal prosecution . Dr. Conrad Murray already faces a criminal charge .
Jackson asks federal drug agents to probe seven other doctors , one nurse . One doctor referred to medical care . Attorney General : No evidence to support criminal prosecution . Dr. Conrad Murray already faces a criminal charge .