I've seen how bad people are at skimming things they read online though even when the facts are laying there in front of them, and I could easily see someone (hiring manager, dating app they matched with) just googling their name, seeing the same pic match, and instantly running for the hills.
And, especially if it were something less extreme than serial killer and dates/location seemed plausible at first glance (or not--as you say skimming), a lot of people doing some quick resume triage will see the fraud conviction and move on.
For most people, if they came across a CV of someone who might be a serial killer, they'd want to read the full article. It's not something that happens every day.
