I am working on a techno-thriller novel revolving about a hostage situation during a bank robbery. The twist is that the perpetrator is not present at the scene. He has sent a remote controlled robot into the bank with a bomb.
I have a pretty good understanding of police procedures. I've worked with the police for several years, even have cops in my family. However a prolonged hostage situation is a very rare occurrence, particularly in my little Eastern European country, so none of my contacts can answer a good couple of things on how decisions are made, how various experts consult on matters and what would cause a SWAT officer do or don't do certain things. I believe there can't be a major difference on how such serious situations are handled in any modern country.
I've tried asking on Quora already, but I got zero answers. There are plenty of cops there, but they don't respond. They probably think that I'm actually plotting a real robbery.
So guys, can someone recommend me someone who would help me out on a few specific questions? Not vague and broad ones like "how SWATs work in general", but something like "if the hostage negotiator suggests not to take action, can the commander ignore it", and so on.