MINNEAPOLIS (AP) — The man accused of squirting an unknown substance on Democratic U.S. Rep. Ilhan Omar at a town hall in Minneapolis has a criminal history and has made online posts supportive of President Donald Trump.

Anthony Kazmierczak, 55, was convicted of felony auto theft in 1989, has been arrested multiple times for driving under the influence and has had numerous traffic citations, Minnesota court records show. There are also indications he has had significant financial problems, including two bankruptcy filings.

Police say Kazmierczak used a syringe to squirt liquid on Omar during Tuesday’s event after she called for the abolishment of U.S. Immigration and Customs Enforcement and the firing or impeachment of Homeland Security Secretary Kristi Noem following the fatal shootings of Renee Good and Alex Pretti. Officers immediately tackled and arrested Kazmierczak, who was jailed on a preliminary third-degree assault charge, police spokesperson Trevor Folke said.

Photos of the syringe, which fell when the man was tackled, show what appears to be a light-brown liquid inside. Authorities haven’t publicly identified the substance.

After the attack, there was a strong, vinegarlike smell in the room, according to an Associated Press journalist who was there. Forensic scientists were called in, but none of the roughly 100 people who were there had a noticeable physical reaction to the substance.

Omar continued speaking for about 25 minutes after Kazmierczak was ushered out, saying she wouldn’t be intimidated. While leaving, she said that she felt a little flustered but wasn’t hurt and that she was going to be screened by a medical team.

She later posted on X: “I’m ok. I’m a survivor so this small agitator isn’t going to intimidate me from doing my work. I don’t let bullies win.”

Kazmierczak hadn’t been formally charged or scheduled for an initial court appearance as of Wednesday morning. The Hennepin County Attorney’s Office has until Thursday to charge him but could seek an extension. A spokesperson for the prosecutor’s office didn’t immediately return a call seeking further information.

It’s unclear if Kazmierczak has a lawyer who could speak on his behalf. The county’s chief public defender, Michael Berger, said the case hasn’t been assigned to his office.

A neighbor told the New York Post that Kazmierczak said he was going to Omar’s town hall and “I might get arrested.”

In social media posts, Kazmierczak described himself as a former network engineer who lives in Minneapolis. Among other things, he made comments critical of former President Joe Biden, a Democrat, and referred to Democrats as “angry and liars.”