Answered by Shaykh Faraz Rabbani
Can you pray behind somebody who commits haram actions?
Answer:
Walaikum assalam wa rahmatullah,
The prayer itself would be valid, but it is highly blameworthy to choose an openly corrupt person. It is better to pray behind such a person than to pray alone, though. [Ibn Abidin, Radd al-Muhtar]
Wassalam,
Faraz Rabbani
