Activist Dominique Alexander was arrested Thursday on a theft charge from last year, the latest in a series of legal troubles for the man who helped organize a protest before last year's ambush.

Dominique Alexander (Denton County Jail)

Alexander, 28, was arrested in the Dallas area and booked into the Denton County Jail on Thursday, jail records said. He's accused of property theft between $2,500 and $30,000.

Jail records listed May 4, 2016, as the offense date. The alleged victim lives in Flower Mound and reported the alleged incident to Flower Mound police, who said they forwarded the case to a Denton County grand jury.

Details about the allegations against Alexander have not been released. He was released after posting bond, officials said.

An indictment document shows the theft charge was filed in Denton County the morning of Aug. 18. Alexander attended a Dallas City Hall news conference later in the day as four black city council members called for the city's confederate statues to be taken down.

The same day, Alexander and activist Jeff Hood hosted a news conference to talk about the monuments debate.

"We have to have tangible actions that brings back or helps soothe the pain of the African American community and all of the indigenous communities that have fall prey of hatred and bigotry in this country," Alexander said at the news conference

Rev. Dr. Jeff Hood greets his children Jeff Hood Jr., 5, and Quinley Mandela Hood, 3, as he and minister Dominique Alexander speak to reporters about the Confederate statue removal efforts in Lee Park on August 18, 2017. (Andy Jacobsohn / Staff Photographer)

The Next Generation Action Network founder's criminal record includes a felony injury-to-a-child charge for which he got probation. Police said he shook a 2-year-old.

Alexander's probation violations appeared to be enough to put him behind bars last year. But in an unusual decision, a state district judge gave him credit for time served while free on probation and he was released just days after reporting to prison.

Alexander was one of the organizers of a march against police brutality that became the backdrop of the July 7, 2016, ambush on police officers tasked with protecting the protesters. Four Dallas officers and a DART officer died when a lone gunman opened fire downtown.

Alexander was back in the news this summer when conservative blogger Tomi Lauren criticized him for being part of a Dallas panel that interviewed police chief candidates.

"This is the biggest slap in the face to our police officers I can imagine," Lahren said in a profanity-laden video.

In a July interview, Alexander said he felt Lahren's criticism was unfair and that he was being singled out.

"I cannot focus my life on someone else's narrative of me that don't know me," he said. "I will never apologize for participating in a process that me as a citizen has a right to. I will never apologize, not in this lifetime."