Most people lie a little bit on their resumes, but there's a huge difference between exaggerating your experience and completely altering your identity and history.
In theory, someone trying to pull off big lies would cover their tracks on Google, but there are still people lying through their teeth who haven't even cleared their shady history from the internet.
All it takes is a quick search to unlock rabbitholes of personal history, so employers and interviewers have a far easier time parsing fact from fiction, and the exposed lies can range from comical to terrifying.
1. From tcroark:
I had an experienced applicant for a dispatcher position with our Fire Department. Personable, knew his stuff, always on time and professional. Still, something seemed off, so after about a week the chief finally got around to calling his last employer (in another state) only to be told they had been looking high and low for him as he had multiple warrants out on him for arson. Left in cuffs that day.