Hayes/Moseley Murder Suicide … He Accused Her Of Affair With Trey Songz

EXCLUSIVE

Earl Hayes — the man who cops say shot his well-known wife to death Monday and then killed himself — was haunted by her infidelity … in particular what he said was a fling she had with singer Trey Songz.

As TMZ reported, Stephanie Moseley — the star of VH1′s “Hit the Floor” — was gunned down in their L.A. apartment as neighbors heard…