More than a dozen current and former Los Angeles County sheriff┬┐s deputies were arrested by the FBI or were expected to surrender to investigators as part of a two-year-long probe into alleged inmate abuse and misconduct inside county jails.

Eighteen current or former Los Angeles County Sheriff's Department officials have been indicted in five separate criminal cases in connection with a wide-ranging investigation into allegations of abuse and misconduct inside L.A. County jails.

The four grand jury indictments unsealed Monday and one criminal complaint allege that deputies beat jail inmates and visitors without justification, unjustly detained people and conspired to obstruct a federal investigation into misconduct at the Men's Central Jail.  

Sixteen of the defendants were arrested Monday and are expected to be arraigned this afternoon in federal court. 

MORE: Tracking claims of deputy brutality

“Our investigation also found that these incidents did not take place in a vacuum — in fact, they demonstrated behavior that had become institutionalized," the U.S. attorney in Los Angeles, Andre Birotte Jr., said in a statement.

"The pattern of activity alleged in the obstruction of justice case shows how some members of the Sheriff’s Department considered themselves to be above the law. Instead of cooperating with the federal investigation to ensure that corrupt law enforcement officers would be brought to justice, the defendants in this case are accused of taking affirmative steps designed to ensure that light would not shine on illegal conduct that violated basic constitutional rights.”

Charges in the indictments range from conspiracy and obstruction of justice to improperly arresting and searching visitors to the jails.

Read the documents

In one of the cases, deputies allegedly improperly arrested and searched an Austrian consulate official and her husband during a visit to an inmate who was an Austrian national.  

One of the indictments details three separate incidents in which prosecutors alleged that a sheriff's sergeant encouraged deputies he supervised at the visiting area of Men's Central Jail to use excessive force and unlawful arrests of visitors.

Visitors were taken to a deputy break room, which could not be seen by the public, and beaten by sheriff's officials, the indictment said. One visitor had his arm fractured.

LIVE CHAT: Discuss the indictments Tuesday at 9 a.m.

In June 2011, an Austrian consul's husband was arrested outside the jail because he had walked near the doors going into the visiting center, according to the indictment. 

When the consul requested to speak to a supervisor about her husband's arrest, she too was placed in handcuffs and arrested, even though she had committed no crime and would have been immune from prosecution, the indictment said.

The couple were taken to the same deputy break room, where they were searched, the indictment said.

The indictment accused Sgt. Eric Gonzalez, the supervisor of deputies working in the visiting center, as reprimanding deputies for not using force against visitors who had "supposedly 'disrespected' these deputy sheriffs through the visitors' words or conduct," the indictment said.

The indictment names Deputies Sussie Ayala, Pantamitr Zunggeemoge and Noel Womack as preparing false and misleading reports in an attempt to show that the use of force was justified.

Although the indictment does not identify alleged victims by name, one incident matches the Feb. 26, 2011, date on which Gabriel Carrillo was arrested while attempting to visit his brother in the jail. 

Carrillo accused deputies of beating him while he was handcuffed. Carrillo was initially charged with battery against the deputies following the incident but prosecutors abruptly dropped the case, telling a judge they were awaiting more reports from the Sheriff's Department.

Carrillo said Monday that the indictments mean “justice is being served.” He pointed out that the odds were unfairly stacked against him after the incident because it was his word against several deputies.