Former bank robber Cain Vincent Dyer stole from over 100 banks between 1999 and 2001 - and was never caught by authorities.
Now, two decades later, the reformed ex-criminal has explained in great detail how he managed to carry out such a large number of money heists within such a short period of time.
In a video for Insider, Dyer, who handed himself in to law enforcement after the robberies, explained he would typically head straight for the merchant teller as they would "more than likely have the most amount of currency."
He also shared that he would ask those in the bank to keep their hands down despite the stereotypical command seen in movies featuring robberies in which the robber orders everyone to put their hands up.
The reason for this is that Dyer didn't want to draw any attention to what was going on inside the bank in case anyone outside the building alerted the authorities.
He continued: "That merchant teller along with the manager is the person I would have walk me into a vault ... If they were just a little too afraid or anything, then there were times where I wouldn't go into the vault.
"Typically, I picked banks that were close to merchants. That way, I knew that that bank would more than likely be the banker for all those merchants that were there. And that would mean that that bank would more than likely have more cash on hand."
He went on to reveal that the banks he chose to rob had to be reasonably close to a number of interstates and they had to have various exits.
Before a robbery, he would observe the staff at the bank for about a day and ascertain which of them had the most control.
Dyer also prepped by teaching himself "everything about banks" via bank manuals, employee manuals, and employee guides.
He would dress himself to fit in with the crowd - nothing too conspicuous.
Dyer explained: "I definitely used the Krazy Glue to protect my fingertips and my palms. I would always wear a pair of glasses, always a baseball cap, and that seemed to cover enough.
"The mascara would be, basically, it depended on where I was. If I was in a place where there are more ethnic people, I would typically do a beard."
"If I was in a place where there were less ethnic people, I would more so sometimes go in clean-shaven or a really light shave," he added.
His choice of attire was also based on the weather on a particular day. He would take advantage of cloudy, rainy days by wearing additional layers. On sunny days, however, there would be more people out and so it meant he could blend in more.
Dyer said that were certain banks he would rob during rush hour so that the cops would have a harder time getting to him due to the amount of traffic.
Typically, cops have a response time of about three to five minutes, he stated, which meant he had to park across the street - but he would make sure his car didn't stand out in any way.
When the deed was done and he took off in his car, he would make sure to look straight at the cops if he passed them so as not to look like he had something to hide.
He continued: "I would hide the money in several different places, but to be a little bit more specific, there was this one place that I had opened up the floor of it.
"I don't know, at one point there had to be just millions of dollars in this floor. There were a couple of times I actually put money in, like, a bank vault.
"In, like, a safety deposit box. Wouldn't that've been ironic, had it gotten ... had there been a bank robbery and it'd gotten stolen, huh?"
Eventually, Dyer decided to turn himself in as he reflected on the "psychological tolls that the victims suffered."
Since then, he has worked with victims and ex-offenders in order to rectify the harm he personally caused others.
