The crime spree started in February and didn't end until five months later.
Sergeant Blake Johnson, with the Austin Police Department's Robbery Unit, said, "None of his actions led us to believe that he was being watched or that we were on to him."
Randall Reed, 51, of Dripping Springs, is facing federal bank robbery and firearms charges.
"He was placed in custody in San Marcos. At this time, he has been transferred over to the U.S. Marshall's Office in federal custody where he will be charged federally with bank robbery and weapons charges," said Johnson.
Johnson says Reed is suspected of committing six robberies, four in Austin, one in San Marcos and another in San Antonio.
In February, investigators say he walked up to the customer service station at the Randalls on west Ben White, showed a gun and note saying, "...Give me all the money or you are dead."
Johnson said, "It makes us worry as a public safety agency, what's his next step going to be?"
Reed does not have a previous criminal history.
"Luckily, during any of these he never actually used the weapon, no one was hurt," added Johnson.
Police say his behavior during the robberies escalated. During the last holdup, at the Benchmark Bank on 35th Street, Reed not only pulled out a gun, he also tied up the tellers.
"The biggest success in this is getting him off the street," Johnson said.
It was that robbery where Detective Charles Kleinert ended up fatally shooting Larry Jackson Jr. during the investigation. It was later discovered Jackson Jr. had nothing to do with the Benchmark robbery.
You might be wondering why a guy with no previous criminal history, would start robbing banks.
"There is some speculations, personal reasons if you will," added Johnson. "He has a history of employment...I don't believe he was directly employed for a large part of these."
Court paperwork shows the last time Reed was employed was in 2012. This is also the same year his house fell into foreclosure and his wife was diagnosed with breast cancer.
The arrest was made possible because of anonymous tips and a joint investigation between APD, Round Rock and San Marcos Police, plus Hays County and the FBI.