A man identified by two law enforcement sources as Ricky Shiffer, who died in a confrontation with police after he fired a nail gun at a Cincinnati FBI building, appeared to post online in recent days about his desire to kill FBI agents shortly after former President Donald Trump’s Mar-a-Lago residence was searched.

Two law enforcement officials confirmed Shiffer’s name. Shiffer was at the Capitol riot on Jan. 6, 2021, according to three people aiding law enforcement who saw him in photos taken from the day of the attack; however, it’s unclear whether he went inside the building. Shiffer frequently posted about his attendance at the Capitol on social media.

On Truth Social, a social media platform founded by Trump’s media company, Trump Media & Technology Group, Shiffer appeared to have posted a message detailing his failed attempt to gain entry to the FBI building.

“Well, I thought I had a way through bullet proof glass, and I didn’t. If you don’t hear from me, it is true I tried attacking the F.B.I., and it’ll mean either I was taken off the internet, the F.B.I. got me, or they sent the regular cops while,” the account @RickyWShifferJr wrote at 9:29 a.m. ET, shortly after police allege the shooting occurred.

Shiffer posted to Truth Social multiple times in the days after the FBI searched Trump’s residence in Palm Beach, Florida, about wanting to engage in violence. One post called for people to arm themselves and be ready for “combat.” After another user responded that his photo and information had been forwarded to the FBI, Shiffer’s account responded: “Bring them on."

In response to another user who asked whether Shiffer was advocating for terrorism, Shiffer’s account responded that users should kill FBI agents “on sight” and also target a vague list of enemies who try to stop the slayings. In reply to another user Tuesday, the account responded, “You’re a fool if you think there’s a nonviolent solution.”