RIVERSIDE (CBSLA.com) — “My son shot my husband. I need an ambulance. He’s bleeding.”

That 911 call was made from a Riverside home almost two years ago.

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The dispatcher asks, “How old is your son?”

The woman replies, “Ten.”

The dispatcher couldn’t believe what she was hearing. “Oh God!”

This week, in court, a now 12 year old boy, is on trial for the murder of his father, Jeff Hall.

Hall, the father of five, was the California leader of the National Socialist Movement, the largest Neo-Nazi group in the country.

Today in court, prosecutors showed a video that Hall made hours before his son allegedly shot him, execution style, while he was sleeping.

With his kids present, Suzie Suh reports, Hall would often hold meetings talking violence and Nazi propaganda.

In the video shown in court, Hall is heard bragging that his young son knows how to use a weapon.  “My son was able to operate a gen 1, night vision and then a scope at the age of 9.”

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The defense argued that a climate of hate, fueled with an insistence on gun use, fueled this act of patricide.

In an interview with “60 Minutes” back in June, Joanne Patterson — Hall’s mother — said her grandson had always been violent.

She said he had been kicked out of school multiple times for attacking kids and a teacher. She wasn’t surprised he could snap. “I always felt it could somehow happen. But I thought it would be when he was older.”

The defense will also paint Jeff Hall as an abusive father.

A Riverside Police Detective told “60 Minutes” what the 10-year old told him. “He described his father hitting him, kicking him, pushing him.”

The prosecution says the motive for murder was a more complex one. They claim the boy killed his dad to keep him from splitting up with his step-mom.

The defense says the step-mom manipulated the boy to kill because she was upset he might leave her for another woman.

KCAL9 Legal Analyst Steve Meister believes these are the main questions the judge will ask. “Under what circumstances and why and what was his mental state? Is it a question or murder versus manslaughter — not a question of innocence or guilt.”

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Suh says perhaps the most difficult question facing the court:  What to do with the boy? Whether he is found guilty or not.