BLUFF SIDING, Wis. — The Wisconsin State Patrol dispatched its Technical Reconstruction Unit to figure out what happened in a head-on collision that killed two teenagers and severely injured a third on County Road M. This much is known: A 2007 Chevrolet van with the teenagers and a 2017 Jeep Cherokee crashed at a hilltop Monday. Tere was no visibility either way over the crest. None of the teens in the van had fastened seatbelts. The driver of the Jeep, alone in her vehicle, suffered only minor injuries. The accident was about 6:30 p.m. with the sun low in the sky. One and one-half days after the accident Sheriff Mike Osmond had yet to release any names.