Deb, who has covered the Republican presidential front-runner's candidacy since last summer, was filming video of a man whose face was bloody and lying on the ground near police at the time of his arrest, according to a "CBS This Morning" report Saturday.
"Deb continued to roll as police kept watch," the CBS report noted. "Without warning, Deb was grabbed from behind and thrown to the ground."
A police officer placed his boot on Deb's neck to keep him in place on the ground, according to the account he provided his network.
Illinois State Police charged Deb with resisting arrest though the network reported that neither his video, nor that of a nearby film crew, showed any sign of resistance. The reporter can also be seen on video identifying himself as a credentialed member of the media.
Deb later recovered his camera, which was left on the ground as police arrested him. His arrest was also captured on Fox News during its coverage outside the venue at the University of Illinois.
Despite having covered Trump's campaign from the start, Deb was clearly struck by the clashes between supporters and protesters. He last tweeted:
Reporters have faced increasing difficulties covering Trump's often raucous events, given the campaign's severe restrictions on their movements. Organizers have at times forced them to remain in a "press pen" at events and faced hostility directed at them from the candidate and some supporters.
In January, Deb described how a Trump supporter accused him of being a member of ISIS.
Last month, a Secret Service agent choke-slammed Time magazine photographer Chris Morris after he left the pen to cover a Black Lives Matter protest.
On Friday, Breitbart News reporter Michelle Fields filed a police report related to Trump campaign manager Corey Lewandowski allegedly assaulting her after the candidate's Tuesday night press conference. The Trump campaign has dismissed the charge, despite an eyewitness account of the incident and video appearing to show Lewandowski reaching toward Fields.