

If you deleted the content the authorities have no evidence a crime was committed other than one witness saying “yes, totes CSAM”. They’re not going to be able to pursue the uploaders on that alone, and reporting it will only draw attention to yourself. If it was me I’d shut down or lock down the server and move on.
“Thou shalt not kill” is a pretty straightforward commandment. No qualifiers, no exceptions. No “go ahead and kill if you believe you’re justified”.
Per the New testament so long as you accept Jesus afterward and repent you should be fine though.