Does it even matter that I am innocent?

Pennsylvania wildlife commission showed up at my house and started to ask me some questions. Long story short, some trash was dumped nearby and I had mail in it. I had no idea how that got there. When pressed, I threw out some speculations like, maybe when we first moved in the person who hauled away the trash for us didn't take it to the dump. I told them a friend of a friend did that for us and I didn't have a name at the moment. That turned out to be completely unrelated. Note, I did move here just over a year ago. That trash did go to the dump. Apparently this trash was a more recent incident that, I knew nothing of. I called my husband right after they left and asked him what he knew of this. He didn't know anything about this except that it had something to do with his brother. We love this kid but he isn't the most responsible at times. I have been let down before. I don't think he's lying about this though. To me his story adds up and it took no time at all for him to tell me. He said he was cleaning out the garage and trash. My husband had given him the task to take the trash away since he had a truck and he was the reason it needed cleaned out. A lot of trash was his stuff. Some of the trash was our stuff but we were cleaning out the garage to make more space for brother-in-law's girlfriend. She was moving in to our unit above the garage with him. she already had her own couch and didn't like ours so we needed to move our couch out of the unit for hers. As well as all of the furniture we gave him. Well I guess our neighbor was also cleaning out their garage around this time and had a bunch of trash. They said they were going to burn it on their family members land and offered to take ours too. So my brother-in-law takes him up on the offer and helps him load the trash into the truck. I had no knowledge of any of this. I've been told since my mail was found in the trash that I am linked to this and will be held accountable if I don't get them a name by next week. At this moment I don't have a name but I did tell them what I found out. Not sure if that was a good idea or not. At this point I'm wondering does it even matter that I'm innocent? I honestly like my neighbors. I just wish they didn't do this. This is definitely something I would not have approved of or been a part of. With that said, I don't want to be held responsible for this if I don't have to. Does it matter that I'm innocent? Am I being tricked by the police into thinking that giving them a name will save me any trouble? Also, there are multiple adults at the neighbor's house so at this moment I honestly don't know who it was. My brother in-law has not told me as he wants to first ask them what they did with the trash. Assuming I eventually get a name, will telling them who it was even clear my name? Or should I just accept life's not fair and find a way to pay whatever fines I get from this. After all, at this moment I don't know the answer. I don't know what happened. I'm not withholding information. I could just stop investigating if it's not going to make a difference for me.