Have you ever shaken hands with a killer?

[Rose Lanabell Cat Ear]

This poem really engaged my attention.
I love the title, it stood out to me. i also loved how the title had a question mark in it but the first line didn't, you didn't put another question mark until the end of the first stanza. You expanded your question and built upon it.

I thought the third stanza was a little boring compared to the other stanzas, and a little confusing. "When closer than any other,
You understand they've done their time." is confusing. Did you mean that when you are touching the killer, when they are closer to you physically, you can feel that they have done enough time for their crimes? Perhaps add a "they"

I think you need to work on the rhythm of the poem, but I'm not an expert at all in rhythm so I'm not going to give you any further advice on that.

I liked the last line a lot, mainly because it's straightforward and I can relate to it. I feel like you clarified the idea that a "killer" doesn't have to kill people to be destructive and experience guilt for their destruction in that line, which is good.

Over all I really enjoyed reading the poem, even if it was confusing at times.