** Third Update 3-01-13 ** FRANKLIN, Ohio (AP) _ The rookie Ohio State Highway Patrol hit by a car that lost control on a snowy interstate highway this week remains in critical but stable condition.

The patrol said 26-year-old Brent Hill had surgery Thursday at a Dayton hospital to set his damaged leg. He also suffered head trauma in the accident late Wednesday on Interstate 75 between Dayton and Cincinnati.

The patrol said Hill was investigating a one-car accident on northbound I-75 just after 11 p.m. when he was hit by a second car that had lost control on the slippery road. The car sideswiped the patrol car, then struck Hill and the first car.

A field training officer who was with Hill wasn't hurt, but a supervisor said he was shaken up.

( Franklin, Ohio ) - ** Second Update 2-28-13 ** Hill got out of surgery around 6:30pm and is now recovering at Miami Valley Hospital. There's been no word on how severe Hill's head trauma is. Thursday's surgery apparently was only for his leg.

** Update 2-28-13 ** Lt. Anne Ralston with the Ohio State Highway Patrol says Hill has been stabilized enough to go into surgery for his leg, but remains in critical condition.

Original story:

Just after 11:00pm on Wednesday night, newly commissioned State Trooper 26-year-old Brent Hill of Franklin responded to a crash near mile marker 36 on I-75. Trooper Hill was out of his cruiser on the left berm when he was struck by a car that lost control on the snowy roadway.

Investigators say the car was driven by 22-year-old Andrew Combs of Vandalia, who lost control, went off the left side of the road, sideswiped the patrol car and struck Trooper Hill and the car involved in the first crash.

Trooper Hill went first to Atrium Hospital and then to Miami Valley Trauma Center in Dayton and remains in critical condition. Combs was cooperative and has not been charged. The crash remains under investigation.