Esteban Santiago Ruiz (born 1990) is an Anchorage, Alaska resident known for his role as a gunman killing five people in the Ft. Lauderdale Airport Shooting that took place on January 6, 2017.  He had served in the Army and done a tour of duty in Iraq. 
Ruiz was born in New Jersey, but moved to Penuela, Puerto Rico to live with his brother and mother shortly thereafter. He moved to Alaska in 2015 years ago for work, and had been employed as a security guard. He was "fighting with a lot of people" during his time in Alaska, including his girlfriend, whom he was once arrested for choking. At the time of the shooting, he was receiving mental help for his Depression. 
He served in the Puerto Rico National Guard for six years. He also signed up for the Army National Guard as a combat engineer and served a year in Iraq. Reports indicate he had a history of mental health issues. In November 2016, he walked into Federal Bureau of Investigation office in Anchorage, claiming he was fighing for ISIS. He said that voices inside his head had told him to join the Islamic State. 
Criminal Record 
He was accused of breaking down a bathroom door and assaulting his, as yet unidentified, girlfriend. He was entered into a diversion program. There have also been reports of a child porn investigation that was dropped for lack of evidence. 
February 2015: Eviction for nonpayment of rent.
January 2016: Fourth-degree assault and damage of property, from a domestic violence incident. Santiago settled the charges
On January 6, 2017 Esteban Santiago killed 5 people and injured many more in the Ft. Lauderdale Airport Shooting.  His name was released by Senator Bill Nelson on MSNBC.  He was carrying a military ID.
Santiago took Delta Airlines flight no. 1088 from Anchorage to Minneapolis - Saint Paul Thursday night. He landed Friday morning, and then took Delta flight no. 2182 from Minneapolis-St. Paul to Fort Lauderdale. He then appeared in the Terminal 2 baggage claim area wearing a Star Wars shirt.  Witnesses say he appeared to randomly target his victims during the shooting spree which has left at at least five people dead and many more injured.  He was apprehended by authorities when he stopped shooting to reload, witnesses said.