A: It is permissible and even Mustahab (desirable) to offer condolences even if the deceased died as a sinner by committing suicide. Likewise, it is Mustahab to offer condolences to the family of a person who was killed in Qisas (just retaliation) or Had (ordained punishment for violating Allah's Law) such as the Muhsan (someone in a state of fortification against illegal sexual intercourse outside marriage by virtue of valid current or previous marriage). Similarly, it is permissible to offer condolences to the family of whoever dies of drunkenness. It is also permissible to supplicate Allah (Exalted be He) to forgive and have mercy upon him and other sinful people. It is also permissible to wash them before their burial and offer funeral prayers for them. However, it is not for the ruler or the judge to offer funeral prayers for him. Rather, some common people should offer it for him as a kind of punishment for his bad conduct. If the person dies in an assault committed against him, he is wronged and funeral prayers and Du`a' (supplication) should be offered for him if he is a Muslim. Likewise, the one who dies after submitting to Qisas, funeral prayers, and Du`a' should be offered for him if he dies as a Muslim without committing what would render a person an apostate. Consoling his family is also Mustahab. May Allah grant us success!