Answer:
(Fatwa: 1291/267=TL/1430)
Istikharah is meant for lawful matters i.e. in which doing and not doing both are lawful. Performing istikharah in order to discover defect of someone is unlawful, rather we should think good about a Muslim. Therefore, it is unlawful for you to perform istikharah to discover the aforesaid matter.
You may see the details about istikharah and its occasions in the book ?Islami Shadi?. Get the book and study the same.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband
