His family says good Samaritans who pulled over held his hand and prayed with him while they waited for the paramedics to get there Harter was a member of the Missouri Air National Guard and had served a tour of duty in Iraq.
On Sunday morning, the victim was identified as 23-year-old Cody M. Harter from St. Joseph, Missouri.
On Saturday at approximately 7:30 p.m. emergency crews were dispatched to the area of northbound M-291 Highway near the I-470 merger on the report of a man stumbling in traffic. When first responders arrived to the scene, they pronounced Harter dead, FOX4KC reported.
Police said witnesses saw another vehicle stopped in front of Harter's truck and saw the guardsman, 23, arguing with someone outside their vehicles.
Police believe that Harter suffered a single stab wound to the chest during the argument, stumbled into traffic, and died.
Authorities believe the suspect fled 291 Highway after stabbing Harter. "He knew love", she said.
He was returning from Kansas City in his 2003 Chevrolet Silverado truck, where he had picked up a new lawnmower for his business.
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"I keep waiting for someone to tell me it's not true, that I'm going to wake up from this, but I'm not", she said.
Harter's father said the last thing his son said to them before he died was that he was coming home.
It was at that point when the other driver repeatedly stabbed Harter before getting into his vehicle and driving away. "If you saw anything, even if you think it was nothing, please call", she said. "Let's find who did this senseless act so you're not sitting here when it's your child".
Harter also possessed a lawn care business and has been a fervent dirt motorcycle racer. Please call to put the pieces together.
"He was not just a number", she said.
Lee's Summit police are asking for anyone who may have been in the area at the time or who saw anything to call the TIPS Hotline at 816-474-TIPS or 816-474-8477. "He was my love... and now we know pain and loss".