Grandmother of Georgia school shooter testifies in Colin Gray’s murder trial

Deborah Polhamus, the grandmother of teenage school shooter Colt Gray, took the stand to testify Friday in the murder trial of his father Colin Gray.

​ Deborah Polhamus, the grandmother of teenage school shooter Colt Gray, took the stand to testify Friday in the murder trial of his father Colin Gray. Read More Breaking News, Latest News and Videos | CNN