A Maine police officer “acted within policy” when he fatally shot a knife-wielding man in February, according to an internal review. Waterville Officer Paul Heath shot and killed Eric J. Porter, 32, of Hartland, who reportedly charged at a police cruiser with a knife on Feb. 11, according to the department’s incident review team report released Friday, the Morning Sentinel reported. Police Chief Joseph Massey said he would have no further comment about the report until the state attorney general’s office has completed its own investigation into the shooting. The review found that Heath was trained properly in the use of force, and indicates that pepper spray and an electronic stun gun were unsuccessfully deployed by police before the shooting.