Updated

A prosecutor says defense lawyers for Michael Jackson's doctor will claim at his involuntary manslaughter trial that the singer killed himself.

The statement by Los Angeles County Deputy District Attorney David Walgren came at a hearing Wednesday where a lawyer for Dr. Conrad Murray clashed with the prosecutor over who should test residue from two syringes found in Jackson's bedroom.

Defense attorney J. Michael Flanagan said a huge amount of the anesthetic Propofol was found in Jackson's body but his client has said he gave him only 25 milligrams of the drug.

Walgren suggested the defense will claim Jackson killed himself by injecting more of the drug into himself.

A preliminary hearing in the case begins Jan. 4.