There are a number of things you must do when you are doing Alt detective work.

For your future proof, if the Alt account deletes its posts.
I see you do not archive.

1. Archive the evidence of your discovery.

Link: http://archive.is/

How:
You just put the link profile and copy the link for your proof.

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2. If you want to see the account that you found Alt, has been banned or not, this way.

Link: https://bpip.org/profile.aspx?p=hunter_boy

You simply put the name of the account, see the results.

For the form that you must use, you can see here: https://bitcointalk.org/index.php?topic=2544574.0

see the writing in the code.