I remember that story. It was a bizarre and unfair decision by US Border Patrol and led to considerable controversy about how what was essentially a medical situation got into the shared database. It wasn’t the 911 call or the ambulance that caused that, it was the fact that police were involved in the call and rather unwisely decided to enter the information into the Canadian police database.
The Canadian passport application doesn’t ask about other citizenship. It’s really none of Canada’s business for passport purposes.
Nexus does require you to disclose all citizenships.
What, no tariffs on data? But seriously - one might wonder how thoroughly and effectively these types of co-operation play out in the ‘normal’ real world, never mind the one we’re living in.
Having made it as far as London, I suggest his best bet would be Eurostar to Paris and then a cheap flight from Paris Orly to Athens. Orly is much smaller and therefore less policed than CDG.
There’s a Netflix documentary titled “Running with the Devil” that chronicles the escape of antivirus-pioneer-turned-gun-nutjob John McAfee from Belize, where he was charged with murder. A camera crew was with him as he was making his way out of the country, and a trip on a private yacht to the Bahamas was one of the legs of the journey. (Coincidentally, this odyssey also serves as a reminder of proper data management - a major hiccup in his escape occurred when an online news platform posted a photo of him that they had taken, together with metadata that gave away the location.)
The obvious concern is to what extent some US TLA (Three-Letter-Acronym) monitors all airline passenger manifests worldwide and how fast they could get a request to French authorities. (And of course whether the Eurostar passenger list is also similarly monitored). I presume by the time he reached Paris the US authorties would realize he was missing. I’m not sure how intense the dragnet might get, but why chance it? For his first flight, to London, presumably the US was not yet looking for him but later knew where he could be.
As I understand, both sides of the border have access to essentially the same database. When the police on either side look you up (I presume by name and birthdate) they see all instances where you are mentioned. Same with the border. It simplifies the decision to filter out entry attempts by felons etc. (I have heard that some states - at one time? - do not make DUI a felony and so this data may not make it into that database).
Orly has half as many passengers as Charles De Gaulle. In 2025, it ranks number 14 within European airports.
You seem to suggest that therefore it has a single sleepy Gendarme who only occasionally bothers to do his job.
That may have been the fugitives thinking, but it bears little resemblance to reality.
I doubt that if someone accused of a white collar crime fails to show up in court, the first response will be to issue an international warrant.
Even if that were to happen, there are flight connections between Bermuda and Athens with a few hours layover in London.
That is very likely an airside connection, meaning the first passport control after leaving Bermuda will be in Athens.
Leaving the airport to take any other kind of transport and prolonging your journey only increases the risk of being caught.
I don’t know if that is a valid assumption. It doesn’t say if he was out on an ankle monitor and if not, it could be that the first indication that he was missing would be if he missed the next court date.
I’d say that once he’s in France, the safest way for him to proceed to Greece would be with a combination of trains and ferryboats, which zig-zag the Mediterranean on scheduled routes. He wouldn’t pass through immigration because he’d stay within Schengen, and I don’t think ferryboat operators would bother checking ID. Train operators certainly wouldn’t, with the exception of the Eurostar, which is run in the same manner as a plane.
Once in the EU, it is occasionally possible to even board a plane simply by producing a proof of reservation (without any ID).
Curious this thread has twice been resurrected.
Anyway,
The problem with international watch lists and the like is overwhelming the system.
Interpol has Red Notices for criminals. However in 2025 there were about 15,000 Red Notices total for the entire planet. If every bailed and awaiting sentencing miscreant turned into a Red Notice, the system would collapse. Interpol worries about proper criminals, not petty government officials on the take awaiting sentencing. OTOH, actually fleeing becomes a whole new level. The trick is to be long gone before anyone notices.
Border controls might become usefully tighter with the implementation of ever more automatic recognition systems. But one would want to be careful pre-emptively adding every possible flight risk to the system. Whilst you do that for your own borders, expecting every carrier and country to be happy with a system burdened with many thousands of additions per-day, the nightmare of curation of such lists to ensure that people are correctly removed, and the inevitable storm of false positives clogging everything up, is likely a vain hope.
Most criminals are not that smart. Eventually they decide that it has all blown over, and they get into the mindset that they have gotten away with it. Then they slip up. Doing something silly, like taking a short holiday in a nearby country is the sort of slip-up that ends badly, even many years after the fact. He has elevated himself from the level of a petty flight risk perp to that of a properly wanted man. That attracts serious attention and attention that won’t go away.
It was started four days ago.
Supposedly the US Marshals are looking for Kosta Diamantis, though it’s not clear how they would get him to the United States if they did find him.
Gah! That is me seriously mixing up what I am reading. 
I read the article linked in the OP again. In the article, it says that the guy contacted his attorney after he was already in Greece.
I guess that had he already been declared missing, it would not have been a surprise for his attorney.
That suggests that he was able to escape before he was detected.