I also found one by the same name (first and last) who is a ranking police officer in Nepal, as well as many by the same last name who were arrested in riots and one in a murder, in Khatmandu. The name appears to be common, unfortunately.
In fact, there's a third Gurung who lives in another building on the same block in Chicago as Sabash Gurung and his brother Sushil. I have no idea if this third Gurung is related to the first two. (To give an idea of the commonness of the name, I looked up Gurung in an on-line phone directory. There were 2 more Gurung listings in Chicago beyond the ones I mentioned above, with 149 Gurung listings nationwide.)