Assigned, for the most part. My boss thinks I have a knack for those kinds of cases. Sometimes I do assist with simpler cases, and I do tend to have some choice there.
[He frowns at the second part. It's rare people actually ask him that kind of question. Nothing in York's soft-toned voice reflects anger or anything of the sort, though.] Personal tragedy. I'd... rather not talk about it with someone I only just met.