Police search house with no warrant

There have been a few things that have happened to me last month.

First a friend of mine came by and asked for a ride, and I had my roommate give him one over by K-mart on the west side of town. When he came back he said there were some police sitting over by the mail boxes. I went outside to see what was going on and they pulled up and called me over to them. When I got there, they asked me to take my shirt off. They then asked me who was in my truck just a few minutes ago. I said my roommate and my nephew. They asked to talk to them. When I got to my house, I asked the police officer to wait on the sidewalk while I went to get them. The police officer kept following me to my door. I called my roommate outside. When we were all outside, my little girl came out too. They ran my friend's name and it came back with a warrant. One police officer jumped back a few feet, pulling his gun, and as he raised it, it pointed right at my little girl's head. Talk about child endangerment!

They took my roommate and put him into the car. Then they made me sit on my truck while they searched my house without a warrant. I asked them what this was all about and they would not tell me at that time. Then one of the police officers said that my friend my roommate gave a ride to may have done a burglary in Reno. I said what's that have to do with me? They said they were doing an investigation. I told them I did not know anything about it and they said they would take me to jail if I didn't help them. I said I still didn't know what they wanted and then some other police officer came in and he searched my house again. Then they left.