FORT WORTH, Texas (AP) — A demonstrator who shot and wounded a police officer outside a Texas immigration center last July 4 was sentenced to 100 years in federal prison Tuesday, while other protesters accused of having links to antifa were given multiple decades in federal prison.

Benjamin Song was convicted of attempted murder last March after prosecutors say he opened fire and wounded a police officer at the Prairieland Detention Center in Alvarado.

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The seven other protesters sentenced Tuesday received prison terms ranging from 30 to 70 years.

"Our issue with this case has always been this isn't a bunch of terrorists. This is a bunch of kids and young adults who really have a really big heart and really wanted their voice to be heard," Philip Hayes, Song's attorney, said outside the federal courthouse in Fort Worth. "It was never intended that anybody get hurt. It was never intended that any shots would be fired."

He said his client would appeal the sentencing.

"Song, aside from this day, has had an impeccable life. A former Marine. A good student," Hayes said. "He had a lot of good qualities that were just ignored. The judge went ahead and gave as much as he could."

One of the defendants, Daniel Sanchez Estrada, was convicted of corruptly concealing a document and conspiracy to conceal documents. Others pleaded guilty to providing material support to terrorists rather than take their case to trial.

Prosecutors say the eight are members of antifa, a decentralized anti-fascist organization that has become a target of the Trump administration. They have denied any affiliation and maintain they attended the demonstration to show support for immigrants inside the detention center.

President Donald Trump last fall signed an executive order designating antifa a domestic terrorist organization, even though there is no domestic equivalent to the State Department's list of foreign terror organizations.

Critics warn the case could have wide-reaching impact on protests given that organizations operating within the U.S. are supposed to be protected by First Amendment free-speech rights.

Short for "anti-fascists," antifa is not a single organization but rather an umbrella term for far-left militant groups that confront or resist neo-Nazis and white supremacists at demonstrations.

Last week, federal prosecutors charged 15 people with impeding the Trump administration's immigration crackdown in Minnesota. They claimed the demonstrators were members of antifa who conspired against the federal government to block arrests and deportations by setting up blockades around government buildings and throwing chunks of ice at federal vehicles, among other actions.

Marcelo reported from New York.