The incident took place last night around 10:50 pm when the deceased identified as Mannu Walia was going to Haridwar along with his wife and cousin brother in a luxury car, Superintendent of police (city) Ajay Pal Sharma said.
When they were passing through Raj Nagar extension area, two bikers waylaid their car and fired indiscriminately pointing towards Mannu. Two bullets pierced Mannu's forehead and cheek bone, he said.
Mannu was rushed to district government hospital where doctors declared him brought dead.
Police suspect property dispute could be the reason behind the attack.
Shalini has been admitted in a private hospital under police custody after she fainted during questioning, he said.
The matter is being investigated.