Whiskey kills : a Killstraight story
(Book)

Series numeration from goodreads.com.

When we met Daniel Killstraight, he was a young Comanche man willing to risk his own life to prove the innocence of a man convicted of murder. Now Daniel is a "Metal Shirt," a tribal police officer. When an Indian accidentally kills his own daughter after he's had too much whiskey (a prohibited substance), Daniel is instructed to find out who's behind the running of the illegal liquor; but the evidence points to a white man whom Daniel has no authority to arrest. To make matters worse, someone is apparently trying to make sure Daniel's investigation comes to a permanent, and fatal, stop. - Booklist.