According to a criminal complaint, Rivello sent a message through Twitter that contained an animated image and also said, "You deserve a seizure for your post", which immediately led to a seizure for the victim.
The image was apparently sent in response to Eichenwald's outspoken criticism of then-President-elect Trump, according to the Associated Press.
Following the Tweet, a person purporting to be Eichenwald's wife responded to the troll from the 55-year-old writer's account, telling him the GIF had succeeded in causing an episode and that she'd contacted the police.
Kurt Eichenwald, a senior writer for Newsweek who can be ... confrontational ... on Twitter, said on Friday that an arrest was made in the case.
Eichenwald stated that the images had triggered an epileptic seizure, and he hoped to investigate and identify whoever sent it to him.
Eichenwald, who has openly spoken about his epilepsy previously, said the tweet caused him to have convulsions and was created to trigger an epileptic seizure.
Hagee said the FBI can not comment on ongoing investigations, but Eichenwald tweeted that the agency has details of the other cases of strobes and urged those people to "stop sending them".
"This is not going to happen again. I am. disgusted", he tweeted. He also had trouble speaking and lost feeling in his left hand for several weeks, the NYT report added.
"What [this person] did with his Twitter message was no different from someone sending a bomb in the mail or sending an envelope filled with Anthrax spores", Lieberman says. "It triggers a physical effect".
"After a 3 month investigation, the FBI this morning arrested the man who assaulted me using a strobe on twitter that triggered a seizure", tweeted Eichenwald.
After the attack was reported in December, Stefano Seri, a professor of neurophysiology at Aston University in the United Kingdom, said the material in the tweet must have been carefully constructed.
Since the attack, Eichenwald said, 40 more accounts have sent him strobe lights.
IBT Media is the parent company of Newsweek and International Business Times.