The campaign follows unrest on October 17, when protesters threw projectiles and broke windows at the channel's Paris headquarters during cost-of-living protests.
Left-wing politicians have accused the network of giving too much airtime to anti-immigrant rhetoric, while contacts told French media that the suspect was an avid consumer of the channel.
CNews has previously denied allegations that it promotes far-right views and racist tropes, stating that it defends freedom of expression.
A petition demanding the ban of French television channel CNews surpassed 500,000 signatures following a racist killing.
Contacts told French media he was an avid consumer of CNews, while left-wing politicians have accused such media of giving too much airtime to anti-immigrant rhetoric.
Protesters on October 17 threw projectiles and broke windows at the channel's Paris headquarters during cost-of-living protests.
It has previously denied allegations it promotes far-right views and racist tropes, saying it defends freedom of expression.