Sounds like we were there a bit before you. We were climbing up Harper and passed a couple of riders just before the switchback loading bikes into their truck. They warned us about the gunshots in the area near Conifer and said they had called the police already.
Police cars went by us shortly after; we had a brief conversation with them when it was obvious they weren't quite sure where to go. They drove off and we caught up again a few minutes later, at Conifer. Heard several shots go off that definitely were not from the range.
The police proceeded to stop all traffic from going any further, so we turned around and headed down to go in at the switchback and climb up Galloway.
Don't know what happened after that. Too bad about the incident with the moto guys. Would be laughable if the ladder bridge collapsed under their weight landing them completely in the ditch.