I stopped monitoring at about 3AM but whoever it was on there is gone at the moment. Hopefully it was just a stolen HT and he's run the battery down now, but I have a feeling it might be a former firefighter or soon-to-be former firefighter. From the speech on the radio it sounded like an older white male. I say a firefighter because the guy knew the 10-codes somewhat and immediately stopped talking when a call was dispatched, and as soon as the last unit cleared from the call he would start right back up. The dispatcher outright told him to "shut up" 5 or 6 times.