We have an ex-employee who claims to have injured himself on-the-job. He comes in once in awhile to visit and that's all he can talk about, and it is obvious he intends to sue the ocmpany.
What happened was, a couple years ago, Ex was standing on one of the office chairs trying to adjust one of the overhead lights and he fell off the chair. I happened to be standing right there (he almost fell on me!

) and my opinion is that #1) he was being a bit foolhardy--
I would never stand on an office chair that has wheels! and #2) he did not fall hard enough to sustain the injuries he is trying to claim (herniated disc, sore arm, etc.)
This morning, Ex approached me and asked if I would sign a notarized statement that I saw him fall. I told him I'd "think about it," but my first instinct is to not get involved in this at all. After all, although I did, technically, see him fall, I'm not sure I agree with his claim. I also think he holds a grudge since he was let go from the company. I talked with my supervisor and she agreed with me. Does anyone here have a take on this? How can I put it most politely, when he asks again, that I don't feel comfortable doing that?