BEAUFORT, S.C. (WCIV) -- A Hilton Head Island man was sentenced to 30 years in prison for committing two bank robberies on bank-to-back days in Beaufort County.David Boyd, 51, pleaded guilty to two counts of bank robbery and two counts of making a bomb threat.Officials said Boyd robbed the Bank of America at 101 Windrush Lane in Bluffton on May 1, 2013, and the Bank of America at 21 Hatton Place on Hilton Head Island on May 2, 2013.Judge Carmen Mullen handed down the maximum sentence to Boyd, who was convicted on federal charges in 1995 for robbing two banks near Naples, Florida."He was a ticking time bomb," said Assistant Solicitor Ben Shelton of the Beaufort County Career Criminal Prosecution Unit. "Whenever he faced adversity, Mr. Boyd turned to crime and this was the most brazen, vicious crime of his 25-year criminal history. We are very pleased to see him receive the maximum sentence." Officials said Boyd walked into the Bank of America in Bluffton and handed the teller a note saying that he had a bomb and demanding money.The following day, officials said a worker at a Walmart store on Hilton Head Island recognized a man trying to return items as the robber and called police. Officials said Boyd was involved in a minor collision in the parking lot and a few minutes later, he walked into a second Bank of America. He handed the teller a note stating that he had a bomb and demanded money, officials said.Boyd was arrested at a hotel a short time later and confessed to robbing the banks, officials said.By law, Boyd must serve at least 85 percent of his sentence before being eligible for parole or any other early release mechanism.