Justice
in the UK a crime against the crown is called treason
Heresy
There is insufficient information disclosed in the question to give a complete answer. Anything unlawful having to do with your mail, report it to the your local PostMaster and/or the US Postal Inspection Service.
Yes. US Postal Regulations refer to this offense as "Intercepting Mail Belonging to Another." Contact your local Postmaster or the US Postal Inspection Service.
Oh man. Using the postal service to send drugs brings federal time, and they only charge you if they are sure they can convict. There are too many people messing up to waste their time trying a case they can't convict you on.
Mail from the U.S. Postal Service comes with a guarantee of privacy. If a third party opens mail intended for someone else without the addressee's permission, that person has committed a crime punishable by law. No such privacy exists in e-mail.
Check their official website. It is a Federal crime to take anything out of another's mailbox, unless you are expressly permitted by the owner of the box to do so. Tampering with mail of others, even if it is sent to you by mistake, is also a crime. That goes for Postal Employees and civilians. If you have a newspaper box attached to your mailbox, it is not illegal to put things in it.
In the US, it IS an offense against US Postal Regulations to "intercept" somone else's mail. I am unfamiliar with whether or not telecommunications law covers tampering with voice mail messages.
The duration of Man Against Crime is 1800.0 seconds.
It is technically a federal crime to open someone else's mail. Enforcement is up to the descretion of the US Postal Service and other federal agencies.
This is a crime. If he does not stop, you should contact the police or your local post office. Below is a link to the United States Postal Inspection Service website on how to file a complaint.
Man Against Crime ended on 1956-08-26.