Overview

• Police identified the victim as 61-year-old Lance Chan and arrested his son, 28-year-old Lucas Chan, at the scene Friday night on Helpert Court.
• Witness accounts cited by police describe a verbal dispute preceding the shooting, which left the victim hospitalized before he died.
• A search of the residence led the Alameda County bomb squad to remove suspected improvised explosive devices, according to officials.
• Investigators recovered a 3D printer and multiple unserialized ghost guns, prompting collaboration with the Bureau of Alcohol, Tobacco, Firearms and Explosives.
• Chan faces first-degree murder with a firearm-use allegation and multiple explosives and firearms counts, is jailed at Santa Rita without bail, and is scheduled for arraignment Wednesday.