Just after 11:30 p.m. Tuesday reports of a single car crash on SH 105 near Millmac. NMC Fire arrived first on the scene to find a Mazda on the north side of the ditch along SH 105 East with heavy damage. A male was partially ejected. That male was transported to Conroe Regional Trauma Center in critical condition. DPS Troopers spent almost 2-hours investigating the crash. They still have not determined the cause. The vehicle did leave the roadway, rotated and hit the embankment on the ditch causing heavy damage , the vehicle then rolled. Additional details and photos will be posted Wednesday morning.