Michael Jackson’s doctor has pleaded not guilty to involuntary manslaughter in the death of the pop star, capping an exhaustive investigation into the pop star’s stunning death last summer and setting up the prospect of another sensational celebrity courtroom drama.

Dr. Conrad Murray, a cardiologist who was with Jackson when he died June 25 at his rented Los Angeles mansion, entered his plea Monday in Los Angeles Superior Court just hours after he was charged. He is accused of the single felony count in a five-page complaint, which states Murray “did unlawfully, and without malice, kill Michael Joseph Jackson” by acting “without due caution and circumspection.”

The complaint contains no details on Jackson’s death but authorities have said the singer died after Murray administered a powerful general anesthetic and other drugs to help Jackson rest. Murray has said he did nothing that should have caused Jackson to die. If convicted, he faces up to four years in prison.

Soon after the charge was filed, several members of Jackson’s family, including his mother and father; his brothers Jermaine, Randy, and Tito Jackson; and his sister LaToya Jackson arrived in a fleet of Cadillac Escalades at the courthouse adjacent to Los Angeles International Airport, where hundreds of reporters and Jackson fans were gathered outside. “Looking for justice,” was all Jackson’s father, Joe Jackson, said as he walked past a crowd of reporters and into the courthouse. Murray arrived about an hour later and also walked past the crowd into the courthouse as one person was heard to shout “murderer.”

The charge was expected, and Murray’s attorney, Ed Chernoff, had said he would surrender to authorities at the courthouse. “We’ll make bail, we’ll plead not guilty and we’ll fight like hell,” Chernoff said before the charge was filed