Elton Simpson, one of the two suspected gunmen in a weekend shooting outside a contest for cartoons of the Prophet Muhammad, had been arrested in 2010 and was the subject of a federal terror probe.
At the time, the young man from Phoenix was the target of a terror investigation that had begun some four years earlier. But despite an investigation that involved more than 1,500 hours of recorded conversations, including Simpson's discussions about fighting nonbelievers for Allah and plans to link up with "brothers" in Somalia, the government prosecuted him on only one minor charge — lying to a federal agent.
He faced three years of probation and $600 in fines and court fees, according to court documents. (See the document here)
Then, on Sunday, two men whom authorities identified as Simpson and Nadir Soofi opened fire in the Dallas suburb of Garland on an unarmed security officer stationed outside the cartoon contest. The officials spoke only on condition of anonymity because they were not authorized to discuss the investigation by name.
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The deliberately provocative contest had been expected to draw outrage from the Muslim community. According to mainstream Islamic tradition, any physical depiction of the Prophet Muhammad — even a respectful one — is considered blasphemous, and drawings similar to those featured at the Texas event have sparked violence around the world.
Simpson and Soofi were wearing body armor, and one shot the security officer in the leg. Garland police spokesman Joe Harn said Monday that a single Garland police officer subdued the two gunmen but that after his initial shots, SWAT officers nearby also fired at the two men. Harn said police don't know who fired the lethal shots.
The security officer was treated at a hospital and released.
Homeland Security Secretary Jeh Johnson said in a statement Monday that law enforcement authorities are investigating the men's motives and all circumstances surrounding the attack.
Simpson, described as quiet and devout, had been on the radar of law enforcement because of his social media presence, but authorities did not have an indication that he was plotting an attack, said one federal official familiar with the investigation.
In a statement released late Monday by Phoenix law firm Osborn Maledon, Simpson's family said it is "struggling to understand" how the incident happened.
"We are sure many people in this country are curious to know if we had any idea of Elton's plans," the statement says. "To that we say, without question, we did not."
The statement also says the family is "heartbroken and in a state of deep shock" and sends prayers to everyone affected by this "act of senseless violence."
Simpson had worshipped at the Islamic Community Center of Phoenix for about a decade, but he quit showing up over the past two or three months, the president of the mosque told The Associated Press.
A convert to Islam, Simpson first attracted the FBI's attention in 2006 because of his ties to a former U.S. Navy sailor who had been arrested in Phoenix and was ultimately convicted of terrorism-related charges, according to court records.
In the fall of that year, the FBI asked one of its informants, Dabla Deng, a Sudanese immigrant, to befriend Simpson and ask for advice about Islam.
Over the next few years, Deng would tape his conversations with Simpson with a hidden recording device accumulating more than 1,500 hours of conversations, according to court records.
"I'm telling you, man, we can make it to the battlefield," Simpson is recorded saying on May 29, 2009. "It's time to roll."
In court, prosecutors presented only 17 minutes and 31 seconds during Simpson's trial, according to court documents.
"I have to say that I felt like these charges were completely trumped up, that they were just trying to cover up what had been a very long and expensive investigation and they just couldn't leave without some sort of charges," Simpson's attorney, Kristina Sitton, said.
Sitton described Simpson as so devout that he would not even shake her hand and would sometimes interrupt their legal meetings so he could pray. She said she had no indication that he was capable of violence and assumed he just "snapped."
Less was known about Soofi, who appeared to have never been prosecuted in federal court, according to a search of court records.
Sharon Soofi, his mother, who now lives in a small town southwest of Houston, told The Dallas Morning News that she had no idea that he would turn to violence.
She said her son was "raised in a normal American fashion" and "was very politically involved with the Middle East. Just aware of what's going on."
"I don't know if something snapped," she said.
She told the newspaper Soofi put his son "above everything."
"The hard thing is to comprehend is why he would do this and leave an 8-year-old son behind," she said.
A message left on Sharon Soofi's voicemail by The Associated Press was not returned Monday.
His maternal grandmother, Shirley Dromgoole of Garwood, Texas, told NBC station KPRC of Houston that Soofi wasn't a terrorist and had to have been under the influence of his roommate, Elton Simpson.
"He was a good boy every time I saw him. Real responsible. Respectful,” Dromgoole said.
On Monday, federal agents spent hours at a Phoenix apartment complex where the men apparently lived. Bob Kieckhaver, one of a number of residents who were evacuated for about nine hours from units near the men's apartment, said one of them had a beard and wore an Islamic version of a prayer cap. He was quiet but the second man was more open and would greet others at the mailboxes. Both men were seen feeding stray cats, Kieckhaver said.
Simpson was quiet, never angry and a regular on the basketball court playing with young members of the mosque, said Usama Shami, president of the Islamic Community Center of Phoenix where Simpson worshipped for years. He asked questions about prayer and marriage and was rattled by the FBI investigation into him years earlier, Shami said.
"I've never seen him angry," Shami said of Simpson. "That's the honest truth. He was always having a grin."
In a statement released Monday evening by Phoenix law firm Osborn Maledon, the family of Elton Simpson said:
"We send our prayers to everyone affected by this act of senseless violence, especially the security guard who was injured in the line of duty. As a family we do not condone violence and proudly support the men and women of our law enforcement agencies. We are sure many people in this country are curious to know if we had any idea of Elton's plans. To that we say, without question, we did not.
"Just like everyone in our beautiful country, we are struggling to understand how this could happen. We will not make further statements. We are heartbroken and in a state of deep shock as we grieve. We humbly request that everyone respect our need for privacy."