Remembered as quiet high school student
The younger Ciancia graduated in 2008 from an all-boys Catholic school, the Salesianum School, in Wilmington, according to Brendan P. Kennealey, the school president.
Classmates there described him as awkward, saying he never fit in.
"In four years, I never heard a word out of his mouth," David Hamilton, who graduated with Ciancia in 2008, told the Los Angeles Times. "He kept to himself and ate lunch alone a lot. I really don't remember any one person who was close to him."
Texts alarmed family
It wasn't immediately clear Saturday why he moved across the country. But that may have been where the first signs of trouble began to surface.
In texts to his brother and father, Ciancia said he was unhappy and discouraged living in Los Angeles, according to an intelligence source with knowledge of the investigation. The source spoke on condition of anonymity, citing the ongoing investigation.
It was one of those text messages that made his family think something bad was about to happen.
"Basically, the text message was just a message to the little brother, and the way it was written, they had some concern about it, and that's when they brought it to our attention," Cummings said.
The intelligence source described his texts as "angry" and "rambling."
Father called hometown police chief
The father called Cummings about 1:30 p.m. ET on Friday. Cummings, in turn, called the Los Angeles Police Department, asking them to check on him and make sure he was OK.
When they checked, he wasn't home.
The next Cummings heard, he said, were media reports linking Ciancia to the shooting.
Angry note found on suspect
A note found on the alleged shooter paints a picture of an angry young man.
The materials included a rant that appeared to refer to the New World Order as well as anti-TSA and anti-government claims, a federal law enforcement official said Saturday.
The New World Order is a common conspiracy theory focused on a secretive group of international elites bent on controlling the planet and forming a one-world government.
Sources: Note said "kill TSA"
Investigators found information on the suspect expressing not just anti-federal government sentiment but also anger at the TSA specifically, according to a federal law enforcement official.
Multiple reports cite police sources saying the note included language saying he wanted to "kill TSA" and "pigs."
The evolution of those thoughts, and how they may have led to Friday's bloody shooting, is a story that is yet to unfold.
"We are currently investigating his background and more about him," FBI Special Agent in Charge David Bowdich told reporters.