Paul Anthony Ciancia, the alleged gunman in the shooting at Los Angeles International Airport, is a New Jersey native with strong anti-government views who has been living in the Los Angeles area, FBI spokeswoman Lourdes Arocho said Friday.

Ciancia, 23, is originally from Pennsville, N.J., but it is unclear when he arrived in Los Angeles.

According to Pennsville Police Chief Allen Cummings, Ciancia texted his teenage brother Friday saying he was thinking about taking his own life. Cummings then called the Los Angeles Police Department and requested a well-being check on Ciancia, around 10 a.m. in Los Angeles.

Cummings said LAPD did perform the well-being check, and Ciancia’s roommates said everything was fine.

LAPD spokesman Richard French said Friday afternoon that he could not confirm the check. The exact location of Ciancia’s local residence and the identities of his roommates also remain unknown.

Calls to the home and an auto repair business owned by Ciancia’s father, also named Paul, were not answered Friday.

During a news conference Friday night, Pennsville Chief Cummings said the family was cooperating with authorities and called the Ciancias “good people.” The older Ciancia is a long-time Pennsville businessman. Susan Ciancia, his wife, died in 2009 after a battle with cancer, neighbors said.

Paul Ciancia graduated in 2008 from the Salesianum School in nearby Wilmington, Del., an all-boys Catholic school. Neighbors said he often helped at this father’s auto repair shop after school.

Ciancia reportedly walked into the airport at 9:20 a.m., pulled an assault rifle out of a bag and opened fire. Law enforcement sources reported finding anti-government writings with him after the incident.

At least six people were injured before police officers tracked him down in the airport and shot him in the chest. He was immediately taken into custody.

He remained in critical condition Friday night.

The Associated Press contributed to this report.