Updated

The Latest on a California father accused of killing his 5-year-old son (all times local):

10:10 a.m.

A California man has pleaded guilty to killing his 5-year-old son after a family trip to Disneyland.

Aramazd Andressian Sr. entered the plea to first-degree murder Tuesday in Los Angeles County Superior Court in Alhambra. He previously pleaded not guilty to a murder charge and was being held on $10 million bail.

Prosecutors say Andressian killed his son, Aramazd Andressian Jr., to get back at his estranged wife. Los Angeles County sheriff's investigators have said they think the boy was killed April 21.

The boy had been missing for more than two months before his remains were found near a lake outside Santa Barbara on June 30.

Authorities have refused to say how the boy died, what evidence links the father to the boy's death or what led them to his body.

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7:40 a.m.

A person familiar with the case against a California man charged with killing his 5-year-old son after a trip to Disneyland says he's expected to plead guilty.

The person tells The Associated Press that the agreement is still being finalized Tuesday ahead of a scheduled court appearance for Aramazd Andressian Sr.

The person was not authorized to publicly discuss the matter in advance of the plea and spoke on condition of anonymity.

Prosecutors contend Andressian killed his son, Aramazd Andressian Jr., to get back at his estranged wife.

The boy had been missing for more than two months before his remains were found near Lake Cachuma in Santa Barbara County on June 30.

Authorities have not said how the boy died, what evidence there is linking the father to the boy's death or what led them to find the child's body more than two months after his disappearance.

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12:01 a.m.

A California man charged with killing his 5-year-old son after a family trip to Disneyland is scheduled to appear in court.

Aramazd Andressian Sr. is expected to appear at a preliminary hearing Tuesday at the Los Angeles County Superior Court in Alhambra.

His son, Aramazd Andressian Jr. had been missing for more than two months before his remains were found near Lake Cachuma in Santa Barbara County on June 30.

Authorities have not said how the boy died, what evidence there is linking the father to the boy's death or what led them to find the young boy's body.

Andressian has pleaded not guilty.