Where did Sean Andrew Duncan get the idea to do all these things? Could these ideas have had anything to do with his new, peaceful religion? Could it be from Islam that he got the idea that murdering non-Muslims was a righteous act (cf. Qur’an 2:191, 4:89, and 9:5)? And that prepubescent children could be objects of erotic interest, in light of the fact that Muhammad, the supreme model of conduct for Muslims, consummated his marriage with the nine-year-old Aisha when he was 54?

“His interest in ISIS put him under investigation, but he ultimately was caught with child porn,” by Rachel Weiner, Washington Post, April 9, 2018 (thanks to Patrick):

A Loudoun County man pleaded guilty Monday to obstructing justice and receiving child pornography in an unusual prosecution that began when he fled FBI agents investigating possible plans to commit a terrorist ­attack.

Sean Andrew Duncan, 22, will spend 15 to 20 years in prison under the plea agreement reached in Alexandria federal court, which included details not just of his Islamic State contacts but also of explicit images he had of strangers and an infant relative. Judge Leonie M. Brinkema will decide his sentence July 6.

Duncan was not charged with a terrorism offense, although he was under investigation for what agents described in court papers at the time as behavior “indicative of an individual planning and researching how to conduct an attack.” He admitted Monday that he was trying to stymie that terrorism probe when he destroyed evidence during a search of his Sterling, Va., home on Dec. 29. As FBI agents came to the front door, Duncan ran out the back, throwing a plastic ­Ziploc bag over another group of agents’ heads.

The bag contained a broken thumb drive soaked in chlorine cleaning solution, damaged beyond repair, so its contents remain unknown. But when agents later searched a smartphone seized from Duncan’s home, they found thousands of images of child pornography. One photo included Duncan with the infant relative. There were also thousands of videos of children and women, including other family members, that Duncan took “in a voyeuristic manner of their rear ends,” according to the court ­documents.

During several searches of phones used by Duncan, law enforcement also found Internet research on terrorist attacks, hidden cameras, body-worn cameras, military-style combat gear, bulletproof armor, M-4 rifle magazines, AR-15 rifles, barricading doors, body armor laws, and Islamic State leadership, according to court filings. Authorities said they also found photos on the phones of tactical gear and what appeared to be assault rifles. They said the images appeared to have been taken at a firearms or ­military surplus store.

Authorities also said Duncan’s name was found among the contacts of an Islamic State recruiter arrested overseas.

Duncan, who grew up in Maryland and also has lived in Pennsylvania, converted to Islam his senior year of high school, ­according to online blog posts. In January 2016, when he was 21, he married Zakiya Sadeq, a doctor Duncan met through religious circles who was 14 years his senior. A month later, according to court documents, a relative called the FBI to report that Duncan had begun expressing radical views.

He had expressed interest in the Islamic State as far back as 2015, according to prosecutors, when he began talking to an unnamed woman overseas about getting married and going to Syria. After marrying Sadeq, according to court documents, Duncan asked the woman whether she wanted to be his second wife and go to Syria with him.

Duncan and Sadeq flew to Turkey in February 2016 and were scheduled to continue on to Bangladesh, but they were denied entry and returned home.

He later told the woman overseas that he thought the FBI was watching him and that his wife could keep secrets and knew what to say if questioned, according to authorities….