The court-issued GPS ankle bracelets that track thousands of people across the state fail to keep gun-toting defendants from reoffending, a Herald analysis of city arrest reports going back almost a full year shows.

“It’s a great frustration to law enforcement, it’s a great frustration to the people that we serve in our community,” said Boston police Commissioner William G. Gross. “It’s just repeat offenses with the same folks.”

Gross said his officers must deal with “second, third and fourth” gun-related cases from suspects already on GPS monitors.

Incident reports dating back to October list suspects accused of gun crimes while out on GPS monitoring — including Marquis Martin, 28, wanted for the murder of a South Boston man on Oct. 29 and a drive-by shooting the same day. He was caught in a Rhode Island motel.

In February, an ankle bracelet-wearing suspect reportedly pistol-whipped a North End convenience store cashier with a semiautomatic handgun and took off with $1,500 cash. He was later busted.

In March, a suspected gang member “on GPS monitoring” was arrested for gun possession. During a stakeout, the GPS bracelet was “pinging” away before his arrest.

On Aug. 2, two juveniles, one out on a GPS bracelet, were followed, with a search warrant, into the DeWitt Community Center in Roxbury, where one of the juveniles fought with cops. Police reported finding a loaded .22-caliber revolver wrapped in a T-shirt stuffed in a backpack.

There are about 3,650 people across the state wearing GPS hardware, according to the Probation Department. At an Aug. 14 triple-shooting scene in Mattapan, Gross told reporters that “ankle bracelets do not work,” and pressed judges to get tougher.

“If (suspects and parolees) can’t be rehabilitated on this side, they need to be locked up,” Gross said, calling on judges to be held “accountable” through five-year reviews.

Former judges agreed there’s a need for reform in bail and probation systems, but they called the new commissioner’s shots “unfair.”

“When horrific things happen, to point out judges and fire off criticisms at them is really superficial,” said former Bay State judge Tom Merrigan.

Retired state appellate judge Andrew Grainger said five-year reviews aren’t the answer.

“Would you want to be tried and sentenced before a judge who’s coming up for a review before a body of people who are going to decide whether that judge was harsh enough in sentencing?” Grainger said.

Merrigan said it’s a prosecutor’s job to call for a dangerousness hearing to keep a suspect behind bars.

Jake Wark, spokesman for Suffolk District Attorney Daniel F. Conley, agreed with Gross that the system needs fixing.

“GPS devices simply aren’t deterrents among the cohort of violent offenders who drive the city’s violence,” Wark said, adding “judges rewrote the rules” on bail and could do more.

Bristol County Sheriff Thomas Hodgson said prison populations are generally down and community correction centers — facilities that maintain intense supervision without the full incarceration of a prison — are alternatives to bracelets.

“You don’t put people out in the community and take the risk of putting an ankle bracelet on them,” he said. “You’re telling me you don’t completely trust them to do the right thing.”

Gov. Charlie Baker is expected to file a bill this fall to change how courts treat potentially dangerous defendants, a move Gross said he’s backing: “I wholeheartedly agree with any changes that will be for the people of the community that are doing the right thing.”