I was robbed in the same way in Houston, Texas in June 2005. It was about 12:45 a.m and we  were three in our apartment. We were kept under gunpoint for more than 2 hours. I lost all my documents in the robbery including my passport, I-20 and I-94. They took every valuable things from our room. A black police arrived, but he didn't do anything. We were also neglected by the Houston Police. They left lots of clues behind, but our case was still pending when we called a week later to follow up the progress in the case. I told pin number of my debit card when they held gun on my head. It was really scary. Mero ta ek hapta jasto satoi gayo!!
Lesson: be careful and keep your door locked. Never ever stay outside at night.