The son of actress Susan Cabot, the star of many 1950s B-movies, was convicted Tuesday of involuntary manslaughter for bludgeoning to death his mother with a barbell.

Timothy Scott Roman, 25, had been charged with the second-degree murder of his mother. But in closing arguments at his non-jury trial, the prosecutor asked for a reduced voluntary manslaughter conviction.Van Nuys Superior Court Judge Darlene Schempp went further, convicting Roman of the lesser charge of involuntary manslaughter.

Roman, who was born a dwarf and took steroids and other drugs to stimulate his growth to his current 5-feet-4 inches, is scheduled to be sentenced Nov. 29 to up to six years in state prison.

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