It seems to me that legal research methodology is quite on topic here. I don't think that it is exactly "off topic" to give an actual name and web page (though it would strongly resemble spam); but it might be "inappropriate". So, if your real question were "how do I find previous cases where Michael Cohen was the attorney of record", you could substitute an a pseudonym. This would especially work if you explained what you had already tried butthat didn't work.