Jonah 1:8

"Then said they unto him, Tell us, we pray thee, for whose cause this evil is upon us; what is thine occupation? and whence comest thou? what is thy country? and of what people art thou?"

There would have been no need whatever to elicit any confession of guilt from Jonah, if the sailors had had any faith, absolutely, in their casting of lots. But with that, as a starting point, they plied the suspected prophet with a series of urgent questions; and Jonah did not disappoint them.