Cheating death and fighting communism: that is how a fellow officer once described our job.  It was meant to be funny, but as time went on it seemed all too true.
I spent more than ten years in law enforcement, all of it on the street in uniform patrol.  I've been a patrol officer, instructor, sergeant and lieutenant. 
Do not report crimes here. Nothing here should be considered legal advice. All opinions are my own.
                             Detectives can participate in a warrant service, and frequently do.
A high risk warrant service is usually handled by a SWAT team, which can have detectives on the team.  Once the scene is secure, non-SWAT officers/detectives will frequently be responsible for the securing and documenting of evidence. 
                          
If you feel you have been improperly searched by officers, you can contact their agency and file a complaint.
                             In a nutshell, the injured intruders would be transported to the hospital under police guard.  When released, they would be arrested and transported to jail pending trial.
The homeowners would be interviewed on scene but not arrested or charged with any crime based on the facts provided.
If the intruders were killed, pretty much the same as above, but the deputies would be in the house a lot longer and the M.E. would respond and take custody of the corpses.
There are a lot of minute details that go into any investigation, especially major felony cases like this, but that is the quick and dirty. 
                          
                             I doubt there are very many auto parts that are illegal.  What you do with them might be.  For example, selling exhaust cutouts is legal.  Running them on a street car is illegal.  Running them on a track is legal.
Chances are any of the headlights in an autoparts store are legal for your area.  If you have any doubts, contact your local department and talk to one of the traffic enforcement officers.  He or she will be able to give you the exact information you are looking for. 
                          
Bowling Alley Attendant
What do bowling alleys do to keep those nasty shoes clean/sanitary? 
                                        
                                        
                                             Employment Lawyer
Can a man sue if he's denied a job at Hooters? 
                                        
                                        
                                             Nurse Practitioner
Could a nurse practitioner do the job of a primary care physician? 
                                        
                              
                             No idea what department it is, or what equipment they have in place.  The agency may have recorded video, but it is impossible for me to know.
If this lieutenant works midnights and gets off at 7 am, the time is pretty reasonable for his/her schedule and doesn't suggest any nefarious activity.  
                          
                             Carrying a fake gun may or may not be illegal depending on your jurisdiction.  You should either contact a criminal defense lawyer for your area or the local law enforcement agency.
I'm not sure what kind of "protection" a fake gun provides.  If attacked by a criminal, a fake gun isn't going to offer you any protection.  The notion that you will see a known criminal approaching you and that you will have time to draw the weapon AND that the criminal will suddenly be struck by fear upon seeing it is not a realistic one based on my experiences with both violent encounters and the mentality of predator criminals. 
                          
Maybe not. If you have been convicted of certain crimes, there isn't much you can do about that. However, without any prior arrests or convictions, you may still be able to obtain employment as a police officer. A solid military record with an honorable discharge (staying in the active reserves is even better) will go a long way to showing you aren't the person that you may have been in the past. The longer the time space between criminal activity and when you apply is better. Also, holding a secret clearance shows you have previously passed a background check, which helps.
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