Medical examiner’s office called it homicide, but 7 years later, no charges had been filed.

Nearly 7 years later, David Koschman’s mom says she’ll never forget her last words to him.

Says prosecutors’ conclusion that Koschman “was the aggressor” is a “flat-out lie.”

A police report from 2004 had never made public.

Police release photos months after the Sun-Times sought them.

Private investigator’s visit to Koschman witness prompts inquiry from special prosecutor.

Special prosecutor continues to look into why authorities didn’t file charges.

Pleaded “no contest” to two misdemeanors and was fined $600 after victim stopped cooperating.

THE WATCHDOGS: Nine months after a nephew of former Mayor Richard M. Daley pleaded guilty to involuntary manslaughter, not a single cop has been disciplined for letting Richard J. “R.J.” Vanecko get away for nearly 10 years with killing David Koschman. And many of them can’t be punished because they no longer work for the city.