What is the tick like black bug that bites?

I don't think this person is describing an assassin bug, which is not black, and does not bite like a tick but "stings" with a huge, needle-like proboscis that unfolds and hurts like a red-hot needle going in! An assassin bug looks more like a large stink-bug from an alien planet, with a distinctive spiny ridge on its back that looks like half a rusty, cogged wheel is emerging from it. I don't think anybody who has ever seen a tick would ever call an assassin bug "tick-like"!

I've been bitten twice this year by a "black, tick-like bug" myself, and have been trying to find out what it is. The bug I'm trying to ID (and I suspect this person is also trying to ID) looks more like a small, shiny black ladybug and attaches itself to your skin just like a tick does. It even makes the same "tik!" sound when you pluck it off your skin. It also itches terribly for many days, the same way tick bites do. But I know it can't be a tick, because it's very easy to squash between your fingers, something nobody can do with a tick. I'm fairly certain it's some kind of beetle. Next time I find one on myself, I'll be sure to take a picture of it before squishing it!