I didn’t put all those requirements on it. The only purpose of the photo is to gauge (imperfectly, I admit, as all psych experiments are) whether the person in the study valued dogs over all people, or only over POC. I totally agree that police forces are racist (and you even added another level of requirement that cop has to be white, whereas I have noticed non-white cops who are still racially biased against POC in their policing) and I also wouldn’t bother trying to find a picture of a white police officer training a dog on a white woman or child because yeah it would be inconceivable — almost. (White male police officer training a dog on his white ex-wife — yeah I could see that, actually.)