I would say the prime suspect, _______ which I don't.

• If যুক্ত Clauseটি Past Indefinite Tense হলে,
- অন্য বাক্যটি would/ might/ could + verb এর present form হয়। 
যেমন: 
I would say the prime suspect, if I practiced criminal law, which I don't.
What would happen to your family if you were to die in an accident?
If Dad were here, he would know what to do.