The US Attorney's office reports that Robert H. Brady, 41, pleaded guilty today to robbing the Cambridge Savings Bank in Charlestown on June 28, 2018.
According to prosecutors, Brady went up to a teller and demanded: "Give me everything or I will come back and blow this place up."
The teller gave him a bag with $912 in cash - and a GPS device that quickly led arriving police to him.
Brady faces up to 20 years in federal prison at his sentencing on May 5.
First-time offenders rarely get the maximum sentence allowed under federal law, but Brady is not a first-time offender.
In 2008, a federal judge sentenced him to two years in federal prison for being a felon in possession of a firearm.
In 2010, a federal judge sentenced him to almost four years in prison for once more being a felon in possession of a firearm, after a car chase that ended with Brady running away from Somerville Police, who discovered a bag with a loaded gun in the stolen vehicle Brady was driving. An FBI agent wrote in an affidavit that Brady had been planning to use the car, stolen the day before in Charlestown, rob a bank in Arlington.