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The court previously heard that Hynd met Alex at a bar in Kirkcaldy and had gone back to Hynd’s house in the Fife town.
Forensic toxicologist Joanna Wylie told the jury there was cocaine in Alex’s blood and enough alcohol to put him at seven times the drink-drive limit.
It could have led to aggression, she added.
Mr Stewart said Hynd, who is claiming self-defence, told police he had been hit on the head with a bottle and that he had grabbed the blade of the knife when being attacked by it.
The Crown case has closed and the trial will resume on Tuesday.
Calling for upgrade
Google are expected to unveil their next smartphone – designed to rival Apple’s iPhone X – on October 4 after confirming a live event on that date.