(CNN) — As Boston celebrated the capture of a suspect in the marathon bombings Friday night, a debate erupted in Washington over whether military or civilian law would best handle Dzhokar Tsarnaev.
"This guy didn't rob a liquor store. He wasn't working for the Mafia," Sen. Lindsey Graham, R-South Carolina, said Saturday on Fox News. "My God, they were at war with us, we need to be at war within our values and within our laws."
He and several other Republican lawmakers called on President Barack Obama and prosecutors at the Justice Department to treat Tsarnaev, at least initially, as an enemy combatant under military law -- and without certain protections such as an attorney -- rather than through the civilian courts as a criminal suspect, where his route begins with a reading of the Miranda rights. The designation as an "enemy combatant" has precedence and would be appropriate here, Graham and others say.
The hospitalized Tsarnaev is in federal custody, and prosecutors are preparing terrorism and possibly other charges against him, a Justice Department official told CNN. He could also face state-level murder charges, but the death penalty would not be an option under Massachusetts law. Federal authorities could pursue the death penalty.
Twelve hours after capture Tsarnaev had not been read those Miranda rights, which include the right to remain silent, the right to an attorney regardless of financial circumstances and the warning that any statements can be used to aid his prosecution.
A Justice Department official said federal prosecutors would use the public safety exception to the Miranda rule, which allows investigators to question a suspect before apprising him of his rights when they believe there is an imminent public safety threat. Federal officials called in the interagency High Value Detainee Interrogation Group, which includes investigators from the FBI and CIA who specialize in collecting intelligence from terrorism suspects, to question Tsarnaev.
After the Friday capture, Obama commended authorities' efforts and said the surviving Tsarnaev would move through the court system.
"When a tragedy like this happens, with public safety at risk and the stakes so high, it's important that we do this right," he said. "That's why we have investigations. That's why we relentlessly gather the facts. That's why we have courts. And that's why we take care not to rush to judgment - not about the motivations of these individuals; certainly not about entire groups of people."
In addition to Graham, Republicans Sens. John McCain of Arizona and Kelly Ayotte of New Hampshire, joined by Republican Rep. Peter King of New York, commended investigators for not reading Tsarnaev the Miranda rights but said they were concerned investigators would soon do so.
"We have concerns that limiting this investigation to 48 hours and exclusively relying on the public safety exception to Miranda, could very well be a national security mistake. It could severely limit our ability to gather critical information about future attacks from this suspect," they said.
Separately, King said Friday night after the suspect was taken into custody, "The fact that these terrorists were from overseas, living legally in our country for a period of time, and the fact that there was no federal intelligence or chatter prior to the marathon bombings demonstrates once again the Islamist terrorist threat to our country from within our borders."
Sen. Saxby Chambliss, R-Georgia and a member of the Senate Select Committee on Intelligence, issued his own statement saying, "This is not an ordinary criminal case, and a brief interrogation under that exception is wholly insufficient. Our courts, including the Supreme Court, allow detaining and interrogating terrorism suspects as enemy combatants, regardless of citizenship, and there is no reason to not follow that precedent here."
Juliette Kayyem, a former assistant secretary of Homeland Security and CNN national security analyst, said Saturday that to debate the issue was "absurd."
"I think it's an important statement especially after what this city went through to say, 'Yup, now you're just a normal criminal and we're just going to put you through the process,' " she said, adding that the initial use of the public safety exemption was justified.
The American Civil Liberties Union, however, said the U.S. should "not waver from our tried-and-true justice system, even in the most difficult of times. Denial of rights is un-American and will only make it harder to obtain fair convictions.'
"Every criminal defendant is entitled to be read Miranda rights," the group said in a statement. "The public safety exception should be read narrowly. It applies only when there is a continued threat to public safety and is not an open-ended exception to the Miranda rule. Additionally, every criminal defendant has a right to be brought before a judge and to have access to counsel."
Rep. Adam Schiff, a California Democrat and a member of the House Intelligence Committee, said investigators were appropriately using the public safety exception but should not declare him an enemy combatant.
"This is not a foreign national caught on an enemy battlefield, but an American citizen arrested on American soil," he said in a statement. "The Justice Department has demonstrated a far greater ability to successfully prosecute suspected terrorists in federal courts than the military commissions have thus far been able to show. Nothing must be done to compromise the public safety, the ability of prosecutors to seek justice for the victims or our constitutional principles."
In recent examples of domestic terrorism handled by the Obama administration, individuals initially questioned under the public safety exemption were later tried in civilian court rather than held as enemy combatants. Umar Farouk Abdulmutallab and Faisal Shahzad were tried and convicted of their foiled or failed bombing attempts -- Abdulmutallab for plotting to blow up an airplane on Christmas in 2009 and Shahzad for his 2010 attempt to detonate a bomb in Times Square.
"The FBI has been very successful even after giving the Miranda warnings to these subjects to get them to talk about what they've done, to get them to cooperate," said Tom Fuentes, a former assistant director of the FBI and CNN law enforcement analyst.
The interrogations, he said, would be focused on public safety because "we don't know if they've placed additional devices, booby traps or have a separate cache of weapons and explosive material somewhere in the Boston area."
"They really, to be frank, they don't need his confession to prosecute and convict him," he said. "There's going to be more evidence in this case than you'd have in almost every other case that you have because they're on video, you have the forensics, you have these murders of police. There is ... no need for the Miranda warning in this case. "
It was not clear how long the public safety exemption could be used. Attorney General Eric Holder wrote in a 2010 memo the FBI believed "that in light of the magnitude and complexity of the threat often posed by terrorist organizations, particularly international terrorist organizations, and the nature of their attacks, the circumstances surrounding an arrest of an operational terrorist may warrant significantly more extensive public safety interrogation than would be permissible in an ordinary criminal case."
The brothers were immigrants to the U.S. from the Russian Caucasus, an area that includes Chechnya and Dagestan. Tsarnaev was born in Kyrgystan, came to the United States in 2002, and became a citizen on September 11, 2012. His older brother was not a U.S. citizen but was in the country legally.