Under what circumstance can detention staff refuse to deliver regular mail?

Detention staff can refuse to deliver regular mail if it threatens the security of the institution. This response aligns with the responsibilities of detention facilities to maintain a safe and secure environment. Mail can be a conduit for various threats and security risks, including, but not limited to, plans for escapes, gang communications, or contraband. When the content of the mail poses a risk to the safety of staff, inmates, or the facility itself, it is within the staff's authority to withhold that mail to protect all individuals involved and maintain order within the institution.

Regarding other options, language considered inappropriate might be disallowed, but it does not necessarily pose a threat to the institution's security in a physical sense. Similarly, while mail addressed to known criminals might raise suspicions, not all mail to such individuals is inherently dangerous or security-threatening. Unauthorized channels could indicate procedural violations, but the actual refusal to deliver would be most justified when the content of the mail itself threatens safety or order.