It depends on where you live. Some off duty officers can arrest you, however in some places, the can only detain you where u stand until an officer is at hand to arrest you. -In fact anyone, including an off-duty police officer, can arrest you. It is called Citizen's Arrest.
Generally speaking, yes.
If they are retired no. But , if they are not retired then they can if they wanted.
Yes, as long as they carry their warrant card. A citizen can arrest you if they witness you commit a crime. Police can do it if they suspect you have or are about to, whether they are on duty or not.
Police are always able to arrest you. Actually, anyone can do so under a citizens arrest. The likelihood of you getting away with any issue is much lower if a policeman nabs you even while off duty. They now how to make charges stick better then a private citizen might. Police are allowed to carry their guns because they are considered on duty whenever awake.
Is it legal? If the off duty police officer has commited some sort of ticketable offense, yes.
Yes, an off-duty officer can arrest a DUI offender or any offender for that matter
A police officer is a police officer 24/7/365, whether they on or off duty, or whether they're on vacation or not. every police officer has an on duty and off duty gun, they can only carry their off duty guns, and can only use it if he/she or someone else is in danger.
Yes, an off duty police officer can write a ticket on or off duty. The ticket can be mailed to you, or you can be served with a subpoena to appear in court to answer to the charge on the ticket.
almost all locations allow off-duty officers to issue citations if nessescary.
No, an off duty officer can not issue a ticket in the state of Alabama. An officer must be on duty before they arrest someone or issue a ticket.
If he is engaged in activity that requires being a police officer, such as making an arrest or serving a warrant, then, yes. Otherwise, the off-duty office is not obligated to tell anyone he is an officer. One exception could be for members of law enforcement agencies that are required to disclose their status during any adverse police contact (such as a traffic violation), but those are fairly rare. In most cases, off-duty officers can leave it all at work and not take on any police responsibilities until it's time for them to go back on duty.