Tyler Robinson, the man accused of fatally shooting prominent US conservative activist Charlie Kirk on a Utah college campus last year, pleaded not guilty to a murder charge that a judge ruled could carry the death penalty ↧ Defendant pleads not guilty in Charlie Kirk capital murder case Tyler Robinson, the man accused of fatally shooting prominent U.S. conservative activist Charlie Kirk on a Utah college campus last year, pleaded not ‌guilty on Tuesday to a murder charge that a judge ruled could carry the death penalty.