Stuck in end part of Tex 04: "San Francisco" (ITALIAN)

[andreas]

Hey italians,

has anyone of you guys ever played this part 'til the end?

I am VERY far advanced in the game. (SPOILER ALERT!)

- found the knocked-down victim in the street (hidden under a blanket; a former accessory of Diamond Jim who knew too many things)
- found a way to dress as a marine and entered the seaman's pub at the harbor
- found the password of the secret back room in the Chinese restaurant
- found out about an illegal armoury located in the back room of the 'Eldorado' (gambling house)
- found Diamond Jim's henchman and overpowered him
- found my trusty friend Kit Carson hiding and fussing about a beautiful young teacher inside the school building!

After telling everything to my friend, police officer Tom, a murder happens and the game is over.

My suspicion is that I must find the hideout of my red Indian friend Tiger Jack as well as this task might only be possible to solve with two guys!
Unfortunately, I haven't yet, although I'm fairly sure that I scoured for him over the whole damn area.

Since the game is very advanced at this stage, many doors that previously had worked are now blocked (= sub-task completed; no need to enter there anymore).

Does Tiger Jack indeed hide somewhere, or is there another solution to this problem?
Thanks in advance for helping me solve this last tricky task.