2,523. A Shochet With Impaired Faculties

Hilchos Shechita 4:5

If a person with congenital deafness, a person lacking mental competence, a minor or a drunk whose mind is confused performs shechita, the slaughter is invalid; we are concerned that since they lack full capacity, they may have erred. Accordingly, if they slaughter in front of someone knowledgeable who saw that it was done properly, the slaughter is valid.

Hilchos Shechita 4:6

If someone unknown to us slaughters in private, he is questioned. If he is found to know the basic halachos of shechita, his slaughter is deemed valid.