The lawyer for Michael Jackson's doctor says there will be no plea bargain in the involuntary manslaughter case, though he worries whether an impartial jury can be seated for a trial in the death of one of the world's most famous and idolized entertainers. The case against Dr. Conrad Murray is complicated, involving drugs, dosages, medical protocols and other complex issues. Defense lawyers and prosecutors are crafting their legal strategies ahead of a summertime preliminary hearing where much of the evidence may become public. Already, potentially damaging information about Murray has been revealed. Murray maintains his innocence, and his lawyer, Ed Chernoff, has said nothing that he gave Jackson “should have” killed him. Chernoff noted the Jackson employee gave a different version of events to police in another statement. Deputy District Attorney David Walgren will seek to prove the doctor acted with “gross negligence” when he gave the singer propofol to help him sleep. Chernoff declined to discuss how he might defend Murray and said a final decision won't be made until he hears the prosecution's theory at the preliminary hearing. Regardless of what prosecutors present, he said there will be no plea bargain. “Plea bargains are for guilty people,” he said.