It’s been two years since Terence Crutcher died, but once in a while, his sister Tiffany Crutcher will talk about him as though he’s still here. “Terence and I just celebrated our 42nd birthday, August 16th, Tiffany, who has a clinical doctorate in physical rehabilitation, is a health care provider. This particular Wednesday afternoon in late August, she’s put work on hold for 20 minutes so she can talk to you Advertisement Shelby was in the news again that week after TulsaWorld reported that the former Tulsa police officer, now sheriff’s deputy, was teaching a class called, “Surviving the Aftermath of a Critical Incident.” According to the state’s website, Shelby, who killed Terence Crutcher on September 16, 2016, instructs law enforcement officers how to deal with the “legal, financial, physical, and emotional challenges which may result from” killing a civilian, and other such “critical” incidents. Shelby had been teaching the class since last October, she says—five months after her manslaughter acquittal. But that Tuesday in August, the anniversary of Dr. Martin Luther King’s M Advertisement When Tiffany first found out about the class the week before, she says she was “blown away.” “I immediately got sick to my stomach and…