No, I haven't. I've looked at other aspects of police interventions and police-citizen relationship, but I haven't looked at the incidence of suicide.
What I can tell you is that high anxiety levels and no way to cope with them, as well as things like fear and depression, which is one of the outgrowths of racism, can result in suicidal ideation and suicidal events. However, I do not know and cannot answer your question directly. I do not have the answer.