It is not albolabris. It looks like a popeiorum from the photos. If you can get some better photos that would help. A few years ago stejnegeri were more common so it is possible. Today you dont see them often. Where or who did you get the snake from, that would help also. I would not try and tube it and check the hemipenes. This can ruin the snake if not done the right way.

cheers.