But the affidavit shows a sharp dispute about the amount of drugs the boy received and also alleges Garcia tried to conceal what happened from investigators.
Pham and dental assistant Alejandra Juarez told investigators that Garcia ordered Juarez to destroy Javier's dental chart, which included the notation that the boy had received 16ccs of chloral hydrate.
Mungo told state dental board investigators "Javier was not properly sedated or monitored" by Garcia, who prescribed the oral sedative chloral hydrate, or Dr. Mungo also said improper positioning of Javier on a restraint board could have been a major factor in the boy's death and that numerous routine safety procedures were not followed.
Javier was strapped to a papoose board, used to immobilize young patients.
He was given an oral sedative and an injection of painkiller.
An attorney for Garcia denied wrongdoing on his client's part, as did an attorney for the second dentist involved.
Javier, who stopped breathing in a dentist's chair Aug.
4 and died at a hospital a few hours later, had been taken to the Megdal Dental Care office in Santa Ana to have half a dozen cavities treated.
Garcia told investigators he ordered a 6cc dose of chloral hydrate and "does not recall" if he was in the room when Juarez administered it, according to the affidavit.
The manufacturer's maximum suggested dose for a child of Javier's size is 9ccs, according to the affidavit.
He began a new chart, the affidavit says, showing the boy received 6ccs.
"That is the story," Garcia said to Pham and Juarez when they met shortly after paramedics took Javier to the hospital, according to the affidavit.
Neither Megdal nor his attorney William Kent could be reached for comment Thursday.