HOWARD BLUM: Idaho college murder suspect Bryan Kohberger may walk free over bombshell DNA evidence, but years of investigation have convinced me… he did it!

Over the past two-and-a-half years, I’ve spent weeks in that small college town where four students were viciously stabbed to death in the middle of the night.

I’ve spoken to local Moscow, Idaho law enforcement with first-hand knowledge of the grim events. I’ve questioned FBI agents knowledgeable about the bureau’s exhaustive hunt to find the killer. And I have traveled to hardscrabble Pennsylvania communities where the suspect, Bryan Kohberger, was raised and schooled.