Blood on the Riverbank

A lazy summer river float turned into an unimaginable nightmare.

When 54-year-old Nikolai set out to help a friend retrieve a lost phone, he stumbled into a tense confrontation with a group of rowdy teenagers.

Taunts escalated into violence, and in a moment of drunken panic, Nikolai unleashed a knife, leaving one teen dead and others injured.

Was it self-defense or a reckless act of rage?

As video evidence unraveled his story, the tragic events of that day shocked a small Wisconsin town.

A gri...