As more details emerge about the Ft. Lauderdale airport shooter, Esteban Santiago-Ruiz, 26, who on Friday afternoon opened fire at the baggage claim area at the airport, killing 5 and wounding 8, we start to get a detailed glimpse not only into his past, but his numerous recent interactions with authorities.

Esteban Santiago, the suspected shooter at Ft. Lauderdale Airport on Jan. 6, 2017

According to law enforcement officials, Santiago was found with an active military ID and is an American citizen, born in New Jersey. Previous known addresses include Penuelas, Puerto Rico and Anchorage, Alaska.

They add that in November 2016, just two months ago, he walked into an FBI office in Anchorage claiming that the government had "forced him to watch ISIS videos" and to fight for ISIS. According to a slightly different narrative presented by CNN, source said that Santiago was hearing voice telling him to join the Islamic State. Ultimately he was sent to a psychiatric hospital.

AP confirms that Santiago's brother said the suspect had been receiving psychological treatment while living in Alaska. Bryan Santiago told The Associated Press that his family got a call in recent months from 26-year-old Esteban Santiago's girlfriend alerting them to the situation.

Bryan Santiago said he didn't know what his brother was being treated for and that they never talked about it over the phone. He said Esteban Santiago was born in New Jersey but moved to the U.S. territory of Puerto Rico when he was 2 years old.

He said Esteban Santiago grew up in the southern coastal town of Penuelas and served with the island's National Guard for a couple of years. He was deployed to Iraq in 2010 and spent a year there as a combat engineer with the 130th Engineer Battalion, the 1013th engineer company out of Aguadilla, according to Puerto Rico National Guard spokesman Maj. Paul Dahlen.

Sen. Bill Nelson of Florida said that the gunman was carrying a military ID that identified him as Esteban Santiago, but that it was unclear whether the ID was his. Nelson gave no further information on the suspect.

As CBS adds, in 2011 or 2012, Santiago was investigated by Homeland Security Investigations for child porn. Three weapons and a computer were seized, but there was not enough evidence to prosecute, according to law enforcement sources. Santiago also has a record for minor traffic violations and was evicted in 2015 for not paying rent.

Furthermore, AP notes that according to a military spokeswoman Santiago received a general discharge from the Alaska Army National Guard last year for unsatisfactory performance.

Lt. Col. Candis Olmstead did not release details about 26-year-old Esteban Santiago's discharge in August 2016. Olmstead said that he joined the Guard in November 2014.

Puerto Rico National Guard spokesman Maj. Paul Dahlen said that Santiago was deployed to Iraq in 2010 and spent a year there with the 130th Engineer Battalion, the 1013th engineer company out of Aguadilla. Olmstead also said that Santiago had served in the Army Reserves prior to joining the Alaska Army National Guard.

Previously, a spokeswoman from the Canadian Embassy says the suspect in the shooting at the international airport in Fort Lauderdale has no connection to the country and did not fly to Florida from there. Embassy spokeswoman Christine Constantin said in an email to The Associated Press that the suspect did not travel from Canada and was not on an Air Canada flight. She says the suspect has no connection to Canada.

The shooting happened at the airport's terminal 2, where Air Canada and Delta operate flights. Five were killed and eight wounded. Constantin's email says, "We understand from officials he was on a flight originating in Anchorage, transiting through Minneapolis and landing in Ft. Lauderdale."

Meanwhile, authorities are looking into what event may have set off the unstable Santiago.

Law enforcement sources said the suspected gunman in a deadly attack at Fort Lauderdale-Hollywood International Airport got into an argument during his flight from Alaska to Florida. They’re now investigating whether that’s what set off a shooting rampage CBS reports.

Esteban Santiago-Ruiz, 26, took a flight from Alaska to Florida Friday with a stop in Minnesota, officials said. Somewhere along the way, he got into an argument.

According to Broward Commissioner Chip LaMarca, Santiago-Ruiz arrived from a flight with a gun that he checked in. “He claimed his bag and took the gun from baggage and went into the bathroom to load it. Came out shooting people in baggage claim,” LaMarca said.

Earlier reports claimed Santiago-Ruiz came in on a flight from Canada. On the company’s Twitter account, Air Canada confirmed that no one by that name was on their flight. Air Canada flights arrive to Terminal 2, where the shooting took place.

Police were able to apprehend the suspect without having to fire their own weapons when he apparently ran out of bullets.