Interviews: 
- Objective: purpose is to obtain Information 
- Minimal legal requirements; no rights warnings 
- cooperative relationship between interviewer and subject likely 
- no guilt 
- moderate planning 
- Most Important: private and semiprivate; distraction could cause witness to forget key info 
- Interrogations 
- Objective: purpose is to test information already obtained, obtain valuable facts; eliminate the innocent; identify the guilty; obtain a confession 
- extensive pre interrogation legal requirements; rights required 
- hostile relationship likely 
- guilt suggested 
- extensive planning 
- absolute privacy