Coverup.

Dude has green blood.

The Temporal Integrity Commission scrambles to find an explanation and insists that he's really NOT a Vulcan violating the Temporal Prime Directive by being here on Earth long before First Contact.

Tests showed he had taken too many of a headache pill called
sumatriptan.

He was diagnosed a rare condition in which sulphur from the sumatriptan
combined with the blood's haemoglobin to change its colour.

Yeah, right. So why does the article ignore entirely the question of whether or not he has pointy ears and meticulously plucked eyebrows?