when i called them last year, when i started my search to become clean, they told me just show up, with your bag,(shampoo, deodarant, lotion, pjs) and they wont turn you away. they will
help him at least to detox off the drugs/
alcohol. they will keep him about 3 -5 days, but he will need more treatment than that, that will only be the beginning, he must follow up with aftercare. But also as someone else mentioned above, if he does not want to get clean, there wont be too much, you can do.