Is it permissible to swear on the Mus'haf to exonerate a person accused of committing an abomination, given that he does not pray, and how is that done?

Placing one's hand on the Mus'haf (copy of the Qur'an) when swearing an oath is a newly introduced practice, and one should generally avoid swearing oaths. However, if there is a need for it, or if it is requested, some scholars see no harm in it. If the one swearing the oath does not pray at all, he should not be allowed to touch the Mus'haf, as some scholars consider one who abandons prayer to be a disbeliever, and a disbeliever is not permitted to touch the Mus'haf. If the one accused of committing an indecency does not pray, this is not a legal impediment to acquitting him if he is truly innocent. Furthermore, it is not permissible for a Muslim to touch the Mus'haf unless he is in a state of Wudu' (ritual purity), according to the most preponderant opinion.