22-year-old Pushpendra was arrested by Delhi Police from Uttar Pradesh's Budaun district, police said.
Pushpendra, who was allegedly stalking the girl for four years, yesterday barged into her house and shot at her 52-year-old father with a country-made pistol and beat up her mother with a piece of wood.
The couple's 20-year-old daughter was saved as she had locked herself up in a room.
The accused was spurned by the Jains' daughter whom he had been stalking since they broke up four years ago.