Perhaps the negotiator can call in a favor on Bradley's behalf if Bradley shows a sign of good faith and allows the hostages to go free. Providing Bradley alcohol would be against protocol, but the food and the promise of aiding Bradley is getting the help he needs rather than going to jail may be of help. Bradley is looking for help right now and not to get drunk. He also may be looking to make a demand that the negotiator will say no to in order reiterate the fact that Bradley does not trust the police.

If the alcohol is a necessity to Bradley, the negotiator may try to pull some strings and allow it. Against protocol or not, if lives are in danger, providing the alcohol to Bradley may save the lives of some individuals. On the other hand, if Bradley continues to get drunk, he may make a mistake he wouldn't normally make and someone may get hurt.

Issuing a tactical assault on the classroom can end badly, especially since Susan is pregnant. Bradley may very well lose control over his anger and distrust of the police and could intentionally hurt Susan and his unborn child, which could result in two fatalities. At this point Bradley is beginning to understand his situation and is looking for a way out. He knows he's made a mistake and wants the situation to be over with, but he is also desperate and could very well hurt someone out of desperation or the hope that he can get away. The most obvious choice is the professor or Susan, the two people he harbors...

Bradley needs to know that in a few minutes the situation will be out of the negotiator's hands and if he doesn't begin to make the sound decision, the person who has been trying to help him will be taken out of the picture. This may be a one last ditch effort to talk Bradley into allowing the hostages to go free and to turn himself in. A tactical team effort could result in fatalities.
Even though Bradley is calm, if a tactical team bursts in, Bradley may overreact violently. This is typical of non-hostage situations. A tactical team will definitely break Bradley's trust in the negotiator.

References

ZAITSU, W. (2009). Bomb Threats and Offender Characteristics in Japan. Journal of Investigative Psychology and Offender Profi ling, 1(7). Retrieved November 17, 2010, from http://onlinelibrary.wiley.com/doi/10.1002/jip.106/pdf

James, R.K., & Gilliland, B.E. (2001). Crisis intervention strategies (4th ed.). Belmont, CA, USA: Brooks/Cole Thomson Learning.

Noesner, G. (1999, January 1). Negotiation concepts for commanders | FBI Law Enforcement Bulletin, the | Find Articles at BNET. Find Articles at BNET | News Articles, Magazine Back Issues & Reference Articles on All Topics. Retrieved November 18, 2010, from http://findarticles.com/p/articles/mi_m2194/is_1_68/ai_54036504/