Gov. Martin O'Malley called the indictments of 25 inmates and correctional officers at the Baltimore City Detention Center a "positive development" in the fight to dismantle violent gangs in state prisons. (Barbara Haddock Taylor/Baltimore Sun video)

As critics of Martin O'Malley sensed a new political vulnerability, the governor insisted Tuesday that last week's indictment of inmates and correctional officers at the Baltimore City Detention Center was "a positive achievement" in Maryland's fight against violent gangs.

A day after returning from a weeklong trade mission to Israel, O'Malley said that the state instigated and acted as a full partner in the federal investigation that found widespread corruption and smuggling at the city jail. He credited Public Safety Secretary Gary D. Maynard, who has come under fire, with setting up the joint prison task force that drove the investigation.

"We initiated this task force with this goal in mind of going after gangs," O'Malley, a Democrat, said in an interview.

He said the indictments were not the end of a long-running effort to root out corruption and dismantle violent gangs in the state's prisons.

"We're not done yet," O'Malley said. "I share the public's revulsion at these allegations. And we have a zero-tolerance policy toward corruption of any kind, including corruption in public safety, law enforcement and corrections."

But the governor's characterization of the indictments as a sign of progress brought scorn from his political opponents.

"This governor is completely out of touch, and his phony positive spin on this disgraceful failure of leadership is completely unacceptable," said Larry Hogan, chairman of the Republican-oriented group Change Maryland and a former aide to GOP Gov. Robert L. Ehrlich Jr.

O'Malley, Hogan charged, has shown an "absolute failure of leadership and a gross dereliction of duty."

The revelation of deeply embedded corruption at the city jail came at a time O'Malley has been drawing attention in national Democratic circles, with a successful legislative session behind him and improving economic numbers in the state. He has been one of four names — along with Hillary Clinton, Vice President Joe Biden and New York Gov. Andrew Cuomo — on virtually every national pundit's short list of potential Democratic presidential contenders in 2016.

But the federal indictment threatens to tarnish the governor's record, some political observers said.

"There's no doubt whatsoever this will be an issue used against him in a presidential race," said Larry J. Sabato, director of the Center for Politics at the University of Virginia.

Sabato said the situation at the detention center "is no garden-variety prison scandal" and "about as bad as I have seen anywhere, ever."

Last week, a federal grand jury handed up an indictment charging 25 people, including 13 correctional officers, with participating in a smuggling scheme that brought marijuana, cigarettes, painkillers and cellphones to detainees at the state-run detention center.

Gang-related smuggling of contraband is an issue for jails and prisons throughout the country. But the alleged scale of the gang control in Baltimore — and lurid details of correctional officers having sex with prisoners — drew national attention. Four correctional officers were said to have become pregnant by Black Guerrilla Family leader and alleged jailhouse kingpin Tavon White.

National media outlets such as Fox News and National Public Radio were drawn to the story by O'Malley's increasingly open expressions of interest in a run for the presidency. Fox's Bill O'Reilly called for Maynard's firing.

A top FBI official said Tuesday that calls for Maynard's ouster are misplaced.

"To punish the guy for coming forward and asking for federal assistance is absolutely the wrong message," said Rick McFeely, executive assistant director of the FBI and a former head of the bureau's Baltimore office.

McFeely said the federal investigation into gang activity at the jail didn't gain traction until Maynard appealed for federal help and offered his department's full cooperation.

In an interview Tuesday, the top federal prosecutor in Maryland also backed up O'Malley's account. Rod J. Rosenstein, the U.S. attorney in Baltimore, said the public safety department "actively sought and supported" the investigation.

"They were proactive throughout," Rosenstein said.