For weeks, the Dersch family of Columbia, Illinois, had been tormented by a vandal who appeared to have become increasingly unhinged by the "Black Lives Matter" sign they'd erected in their yard — with the repeated destruction of the sign escalating to the gift of a dead raccoon and salt in their flowerbeds.
So when one of Dersch boys spotted a woman pouring salt on their vegetation around 7:30 a.m. on October 16, Sue Dersch knew what she had to do. She hopped in her car and followed the woman, who was on foot — and managed to snap a photo.
The photo turned out to be the breakthrough police were waiting for.…