Is in actual fact Father Joe Maier. He has been working with the slum children, victims of Yaabaa abuse and AIDS children of Klong Toey in Bangkok for about 30yrs. He has a book detailing some of his experiences, highs and lows of his life called "Welcome to the Bangkok Slaughterhouse". It is readilly available in Bangkok, he also has a web site With more information. If you buy the book from a reputable dealer, ie new, a donation goes to the charity the Human Development Fund.
It is well worth buying and shows the other side to life in Bangkok.