Police today arrested his wife Manisha and her paramour Raj.
Subash Chander shot himself to death at his residence in Domporiya Pool area of the city yesterday, police said.
A suicide note was found from the spot in which Chander alleged that his wife was having an extra-marital affair with another man named Raj, which is the reason behind him taking the extreme step, they said.
He also blamed his mother-in-law Sita for his death, police said, adding, efforts were on to nab her.