The incident occurred late last night in Rajgarh town.
Mohit (16) was studying in his room when the accused Surendra barged into the house and opened fire at him with a revolver. He died on the spot.
The boy's parents were not at home when the murder took place, police said, adding, a case has been registered against Surendra, his wife Rina and brother-in-law Sonu.
"Surendra's wife and brother-in-law have been accused of being involved in the crime by the victim's father. All of them are absconding," they said.