There are two basic things that separate private investigations from police-conducted ones. The first is the state-given ability to detain people for interrogation, which private investigations don’t have the power to do. Second, they need a notification of an ongoing crime before on-site investigations can be done. This is where private investigators can step in. For one thing, they can be hired both by police and private individuals to gather information or evidence on suspected individuals. And these can take place outside of ongoing crimes.   Between state-given police powers and a private investigator’s wider work spectrum, there are…