Prosecutors say they expect to upgrade charges filed against a 25-year-old Conway man who was involved in a Feb. 13 crash on East German Lane after the victim died Friday.

According to a probable cause affidavit, Andrew Landon McKnight was driving a Chevrolet Silverado when he crossed over the center line on East German Lane and struck 81-year-old Louis Gray, who was driving a Chevrolet Tracker, head-on.

Paramedics took Gray to Conway Regional Medical Center immediately following the Feb. 13 crash, where he was later transferred to the University of Arkansas for Medical Sciences in Little Rock. Gray succumbed to injuries sustained in the crash following a spinal surgery Feb. 28 and was pronounced dead Friday at UAMS.

Deputy Prosecuting Attorney Taylor Martin said Monday that he plans to upgrade charges against McKnight to include negligent homicide. McKnight is currently charged with second-degree battery, driving while intoxicated, leaving the scene of an accident involving property damage, reckless driving and criminal mischief.

Investigators on scene learned McKnight had taken two Hydrocodones two hours before the crash and was involved in a hit-and-run accident just a few minutes prior to crashing into Gray.

According to the victim of the hit-and-run incident, McKnight "made no attempts to stop" after side-swiping her vehicle.

"The other party involved in [the hit-and-run] accident reported that Mr. McKnight made no attempts to stop after the accident, and she followed him until she was stuck at a red light," one officer wrote in his report. "Another witness reported that, after the first accident, but prior to the second accident, he had seen Mr. McKnight swerving on the road so badly that his tires went into the ditch at one point."

A plea and arraignment hearing had been set for Monday morning. However, with plans for charges to be upgraded, his arraignment hearing was moved to April 5.