Good thriller too convoluted for my taste

A family affair! Chris found a childhood friend, Nicky, after a gap of 30 years. The latter he says his father did not kill the great uncle of Chris. The next day Nicky is found hanged.
A detective story pretty well built, pleasant to read, with many characters, which accelerates the progress towards an end a little too far-fetched for me.
Not bad but not sensational.