I was a Radar Controller for 35 years, so have some experience in the field. This includes using Primary Radar alone over a period of 6 years & using PRI & SSR (Secondary Radar) together on the same display screen for the following 29 years.
Unless I have missed something in the 2 radar pictures provided, there is absolutely nothing to indicate positively that any of the "dots" are either parts of an aircraft or of an intact fighter aircraft.
In short, this is totally useless as proof, or even as a suggestion of, any debris or aircraft. However, bearing in mind that the aircraft broke up in flight, large pieces of the aircraft would be displayed on the radar display.
Hope this helps!