Detectives are appealing for anyone who saw a road traffic collision on the A1 Great North Road late on Saturday night (27 August).
The collision happened at 10.06pm on the northbound carriageway at the junction of the A606.
It involved a grey Honda CRV and a black Volvo XC90.
Sadly, the driver of the Honda, a man in his 70s, was declared dead at the scene.
Detective Sergeant Jon Putnam, from the force’s Serious Collision Investigation Unit, said: “We would like to hear from anyone who saw either car immediately prior to the collision.
“Was anything about the manner in which either car was being driven that concerned to you – that you didn’t think too much about at the time, but which now seems significant?
“If you have any dashcam footage and you were driving in the area at around the time of the collision, we’d like to see it. It will help us find out what happened in this collision.
“Any little piece of information will help us identify what’s happened and how the cars came to be in collision with one another.”
Call Leicestershire Police on 101 quoting incident number 768 of 27 August.