Regar was produced in the court today.
The court sent him to police custody till December 22, IG (Udaipur Range), Anand Shrivastav, said.
Regar, 36, had hacked Mohammed Afrazul to death and burnt the body on December 6.
Afrazul had migrated to Rajsamand from West Bengal for work.
Regar had roped in his 14-year-old nephew to film the killing. Regar posted videos of the killing with inflammatory and communal comments to defend the act.
Angry residents torced a car and a shop, police said.
Shrivastava said the situation was under control and no violence was reported today.