Neo-Nazi kills 4, himself, say Ariz. cops

Police believe Jason "JT" Ready is responsible for shooting four people and taking his own life in a suburban Phoenix home. Authorities say that the four others killed were 15-month-old Lily Lynn Mederos; 23-year-old Amber Nieve Mederos; 47-year-old Lisa Lynn Mederos and 24-year-old Jim Franklin Hiott.

Media reports say Lisa Mederos was Ready's girlfriend and Amber and Lily were her daughter and granddaughter.

Ready was known in Arizona for organizing a militia in the desert with the goal of finding illegal immigrants and drug smugglers. The 39-year-old outfitted himself with military fatigues, body armor and gas masks. He also carried assault rifles. Police say he was a former Marine with ties to Neo-Nazi and Minutemen groups.

This undated file photo shows Jason "JT" Ready posing with an assault rifle.

Shooting victims Jim Franklin Hiott, left, Lily Lynn Mederos and Amber Nieve Mederos are seen in this undated family photo.

This undated file photo shows Jason "JT" Ready.

This undated file photo shows Jason "JT" Ready posing with an assault rifle.

AP Photo/The Arizona Republic, Michael Schennum

Police officers stand outside a house after a shooting, where police say a man shot and killed four people, including a toddler, before killing himself, in Gilbert, Ariz., on Wednesday, May 2, 2012.

AP Photo/The Arizona Republic, Pat Shannahan

An investigator walks in front of the house, where police say a man shot and killed four people, including a toddler, before killing himself, in Gilbert, Ariz., on Wednesday, May 2, 2012.

Gilbert police officers walk inside the police tape outside a crime scene Wednesday, May 2, 2012 in Gilbert, Ariz.

A Gilbert police officer stands outside the police tape outside a crime scene Wednesday, May 2, 2012 in Gilbert, Ariz.

Police officers stand outside a house after a shooting, where police say a man shot and killed four people, including a toddler, before killing himself, in Gilbert, Ariz., on Wednesday, May 2, 2012. Police say the man was armed with several firearms, and officers recovered two handguns and a shotgun.

Vehicles sit outside a crime scene Wednesday, May 2, 2012 in Gilbert, Ariz.

Gilbert police officers walk inside the police tape outside a crime scene Wednesday, May 2, 2012 in Gilbert, Ariz.

Police stand outside the scene in Gilbert Ariz. where several people were shot Wednesday May 2, 2012.

Police Vehicles sit outside a crime scene Wednesday, May 2, 2012 in Gilbert, Ariz.