Which record-keeping practice is considered essential for a private investigator to maintain professionalism and facilitate court proceedings?

1. Maintaining detailed, accurate, and contemporaneous notes of all investigative activities, observations, and communications.
2. Only keeping notes on significant findings, discarding rough or preliminary observations.
3. Reconstructing notes from memory at the end of each week to save time during the investigation.
4. Sharing all raw, unedited notes directly with the client as they are generated.