Charles, a creative director, sat in the dock and watched CCTV footage of the attack. Mr Sherriff's widow wept a few feet away at the back of the court.
The trial was adjourned to tomorrow.
A graphic designer was jailed for a minimum of 14 years today for killing telephone executive Phillip Sherriff with a broken bottle.
A telephone executive died after being slashed in the neck with a broken beer bottle at a corporate event, jurors have heard.