Questions to ask: (exact wording)
- When is the bomb going to explode?
- Where is it right now?
- What does it look like?
- What kind of bomb is it?
- What will cause it to explode?
- Did you place the bomb?
- Why?
- What is your name?
- Sex of caller
- Approximate age
- Length of call
Caller's Voice
| Calm | Laughing | Disguised | Deep Breathing | Stutter | Cracking Voice |
| Angry | Crying | Accent | Loud | Nasal | Slow |
| Excited | Normal | Deep | Slurred | Soft | Distinct |
| Rapid | Clearing Throat | Familiar: If so, whom did it sound like? |
Background Sounds
| Street Noises | House Noises | Factory Machinery | Local |
| Crockery | Motor | Animal Noises | Long Distance |
| Voices | Clear | Office Machinery | Booth |
| PA System | Static | Music | Other |
Threat Language
| Well Spoken | Foul | Incoherent | Message Read By |
| Educated | Irrational | Taped | Righteous |