Need help with a situation involving an assault rifle at work.

 I am not active in these forums and almost never log in. So I feel a little strange asking for guidance a second time without providing any myself. I really do need advice and I respect the opinions of Mark and Mike and all of the Manager Tools Managers out there. So please help with an event recently where a coworker of mine brought an AK-47 Assault Rifle to work.

I work for a known worldwide hotel chain, in California, as a bellman. We have around 250 employees on our property. Wednesday I was having lunch with bellman #2. He tells me that he saw bellman #1 showing valet #1 B#1's new AK-47 and a 357 handgun on Tuesday, just the day before. It was on hotel property, in the parking lot, in the rear of B#1's hatchback. I asked him to clarify the details and I left for school. On separate occasions Bellman #3 overheard B#1 saying he was going to keep a handgun in his car to defend himself. Manager #1 was also in earshot of that conversation. Manager #1 later stated to Bellman number three that, "[B#1] was just joking about [the gun]." And Valet #2 overheard B#1 say he had a handgun in his car and noted an occasion when he was out of his car but wished that he was able to use it.

B#1's side of the story is that he stopped off at work for a meeting on his way to go shooting and he was proud of his collection and wanted to show it off.

The very next day, Thursday, before my shift I went to the director of human resources. I reported the incident to her, the names of the two eyewitnesses, B#2 and V#1, and the two earwitnesses, B#3 and V#2. That is a total of four witnesses. I forgot to tell her the part involving M#1. She asks me how I feel about it. I tell her that I am deeply disturbed, and scared. I tell her that I figure that the employee will be fired and retaliate. I tell her how I am so worried about this that I will not be going home after work for fear of my life. She asks why I feel that the employee might be unstable, and I give her specific behaviors that I have seen to lead me to this conclusion.

After questioning at least one eyewitness, the employee is told what was said about him but not who said it. In front of all of the bellmen on duty, he says what he did, apologizes, and says that he will be suspended for three days to think about what he did. The director of human resources comes to me afterwards and asks if I was satisfied with how things were settled. I told her in a lot of ways yes, but I thought the policy was black and white regarding weapons in the workplace. She said those rules were merely guideline and not rules. She said B#1 was very remorseful right from the start. I apologized for overstepping my position in the company. She thanked me for coming forward because if I hadn't, "we would not have known that this was bothering anyone."

So now I don't know what to do. I am afraid to go home. I am afraid to go to work. I have anxiety that is affecting my performance on the job. I have trouble concentrating on my college coursework. My job would be hard to replace. Positions for bellman rarely open up at other hotels. I have a lot of goodwill built up that I would lose. I have other skillsets too; I used to be a manager. I took this job because I needed to stop working 12 hour days if I was going to be able to give school the attention it needed. So do I quit now for my safety and go on unemployment while I look for another job? Do I go above the director's head? Do I just suck it up? Do I even have the right perspective on this situation?

Any insight or advice you have would be greatly appreciated.

--Eden