Just 10 days before the attack, Akram was thrown out of a mosque in nearby Irving, after displaying what was described as erratic behavior.
“He was hostile because he was told that he would have to leave the mosque, that he couldn’t spend the night,” Khalid Hamideh, chief legal counsel of the Islamic Center of Irving, told CNN.
Those held hostage on Saturday also described Akram’s behavior as “increasingly belligerent and threatening,” saying he waffled at times between being apologetic and making anti-Semitic remarks.
Here’s what we know about the events leading up to the standoff and how it unfolded:
Akram arrives in the US
It is not yet known how Akram traveled to Texas after landing in New York in late December. He was not on any US government watch list, a US law enforcement source told CNN, and cleared vetting before arriving in the US legally, according to a separate US federal law enforcement source.
Akram was known to UK security services and had been the subject of a brief investigation in 2020, a UK official told CNN Tuesday, but the investigation was closed when authorities determined Akram to no longer be a threat.
Two teenagers were arrested in south Manchester, England, in connection with the hostage situation and were awaiting questioning, UK Counter Terrorism Police for Greater Manchester said Sunday. Akram hailed from Blackburn, British authorities said, which lies just northwest of Manchester.
Asked to leave a mosque
Akram arrived at the mosque to pray, but became upset after being told he couldn’t sleep inside the building due to city ordinances that bar overnight guests, Hamideh said.
“He became agitated and almost confrontational, telling the folks there that you’ll be judged by the Lord Almighty for, you know, not helping out a fellow Muslim brother,” Hamideh said.
Akram returned the next day, apologized for his previous behavior and prayed without any disorderly conduct, Hamideh said.
3 nights at a homeless shelter
Between January 6 and 13, Akram spent three nights at Union Gospel Mission Dallas, a homeless shelter, according to shelter CEO Bruce Butler. “We were a way station for him,” he said. “He had a plan. He was very quiet. He was in and out.”
Akram left the mission for the last time Thursday, according to their records.
Butler did “not recall seeing him, but he was not there long enough to build any relationships. We had a lot of new faces coming in because of the cold weather,” he said.
Akram didn’t raise any initial alarms at synagogue before service began
Rabbi Charlie Cytron-Walker and vice president for the synagogue’s board of trustees, Jeffrey Cohen, two of the four people later held at gunpoint, talked with Akram before the incident.
“Some of his story didn’t quite add up, so I was a little bit curious, but that’s not necessarily an uncommon thing,” Cytron-Walker told CBS News of Akram as they drank tea before the service.
“He was on the phone, but briefly stopped his conversation,” Cohen said. “He said hello, smiled, and after we introduced ourselves, I let him go back to his call. He seemed calm and happy to be in from the frigid 20-degree morning. His eyes weren’t darting around; his hands were open and calm, he said hello, he smiled.”
After the service began, Akram drew a firearm and began yelling, they said.
Gunman became ‘increasingly belligerent’
When the congregants realized they were hostages, Cohen said he quickly dialed 911, put the phone face down, and followed the hostage-taker’s directions.
“But not exactly as commanded,” he said. “Instead of going to the back of the room, I stayed in line with one of the exits.”
A livestream of the service, which had been set up so people could watch services from home during the Covid-19 pandemic, captured some of the incident before cutting off.
“At any moment, I thought there was going to be a gunshot,” Stacey Silverman, a member of Congregation Beth Israel, told CNN of watching the livestream.
The hostage-taker was “screaming hysterically” at times and occasionally speaking different languages, Silverman said.
As the hours ticked by, Akram “became increasingly belligerent and threatening,” Cytron-Walker has said.
Throughout the hostage situation, Cohen said they all worked to keep the gunman engaged in conversation. “As long as he was talking and somewhat calm, we bought the FBI time to position.”
One of the hostages was released unharmed around 5 p.m., Colleyville police said.
Hostages utilized prior training to escape
Hours later, Cytron-Walker saw his opening when he got the gunman a drink in a glass.
“And so there was a chair that was right in front of me. I told the guys to go, I picked it up and I threw it at him with all the adrenaline,” Cytron-Walker said. “It was absolutely terrifying and I wasn’t sure if I was going to be shot, and I did not hear a shot fired as I made it out the door. I was the last one out.”
An FBI team killed Akram after the hostages made their escape around 9 p.m.
Those who were held hostage credited security courses, including active shooter training, with helping them get through the ordeal.
“This training saved our lives,” Cohen said. “I am not speaking in hyperbole here — it saved our lives.”
CNN’s Dan Przygoda, Josh Campbell, Nick Paton Walsh, Kelly McCleary, Elliot C. McLaughlin, Eric Levenson, Jason Hanna, Kacey Cherry, Ed Lavandera, Ashley Killough, Geneva Sands, Laura Jarrett, Arnaud Siad, Joe Sutton and Paul P. Murphy contributed to this report.