Can you tell me the process the law enforcement investigators must follow to "legally" attach a tracking device to a suspects' vehicle

1A)on public property1Bon private property1C)Include a scenario foreachsituation!

2A)Can you explain to me the process by which police detectives utilize commercial security videos as evidence. trial?

2B)Does the use of these videos to identify or prosecute an offender require a warrant?Explain!

3A)An individual while driving crashes into the vehicle in front of them apparently while texting. Can the responding officers check this drivers' phone?

3B)An individual while driving hits and seriously injures a pedestrian. Witnesses tell responding officers that this driver was both speeding and texting?How wouldyou investigate bothof these claims by witnesses?