BENGALURU: A man who appears no less than a demon to his 10-year-old son has been arrested soon after a video showing him mercilessly beating him up went viral.The Karnataka police booked a criminal case and arrested the father, Mahendra Kumar , 37, a resident of Global village near Kengeri in west Bengaluru.In the video, the accused - a plumber by profession - was seen beating up his son first with a mobile charger wire, then a leather belt and finally tossing him onto the bed multiple times. The victim, who is a class III student with a private school, is the lone child of his parents, police said.Police booked Mahendra under the Justice to Juvenile Act and the Indian Penal Code sections 323 (voluntarily causing hurt) and 506 (act with criminal intimidation). After arresting the accused on Saturday afternoon, police produced him before Juvenile Justice Court where he was granted bail.Investigations revealed the mother of the child, a homemaker, captured the video of the beating, which took place on November 17 last year.“On November 17, Mahendra was upset as his wife had complained saying their son was developing the habit of lying. The boy was in the bedroom when Mahendra went inside and asked his son why he was lying. In reply, the 10-year-old said he never lied. This irked Mahendra who lost his cool. First, he beat up the boy using a mobile phone charger. Then he used a leather belt. But what he did in the last act was horrific. Mahendra threw his son onto the bed several times,” police said.Meanwhile, Mahendra’s wife shot the video of the beating so that "she can show it to the boy each time he lied", police said.However, the news got leaked only on January 25 when Mahendra’s mobile phone developed technical snags. “Mahendra gave the mobile phone to a nearby repair shop and the shop owner, who stumbled upon the video, leaked it on the social media,” police added.