FBI agents searched the Fort Worth apartment of the man identified as the gunman who opened fire outside the Dallas federal courthouse Monday.
Brian Isaack Clyde, 22, lived a short time at the Watermarke Apartments off Overton Ridge Boulevard in South Fort Worth.
Clyde attended Woodrow Wilson High School in Dallas, but transferred to Austin his freshman year, the Dallas Independent School District confirmed.
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According to public records, he joined the U.S. Army at the age of 18 and left two years later.
He then attended Del Mar Community College in Corpus Christi and graduated just last month.
On Facebook, he posted a number of pictures of himself and images of ammunition and a large knife.
He didn't write anything about a shooting.
But on the knife photo, posted Sunday, he wrote, "A modern gladius to defend the modern Republic."
A gladius was a small sword used in ancient Rome.
He also posted a video of himself June 9 talking about thunderstorms that day and waving what appeared to be a rifle.
"I don't know how much longer I have but the (expletive) storm is coming," he said. "However, I'm not without a defense. I'm (expletive) ready. Let's do it."
It's unclear if the rifle he showed in the video was the same weapon he used Monday.
Neighbors at the Watermarke Apartments said Clyde had just moved in a couple of months ago and kept to himself.
"At the time he was just my neighbor, but it was just in passing. You know, never any kind of conversation or anything. It was more of just a passing, never even a hello or a greeting or anything," neighbor Polete Buard said.
Another neighbor explained what it was like to be questioned by federal agents and that they didn't know very much about their relatively new neighbor.
"I walked through there towards my apartment and an FBI agent pulled me over and said, 'Have you seen this guy?' And the only picture they have of him is in his full Kevlar with the black on," Candace Cantwell said.