The police are relatively isolated from wider society and often feel under public scrutiny. (may be reluctant to answer for fear of criticising)
Getting ‘backstage’ with police officers is difficult, they regard them as ‘home office spy’s’
A commitment to the ‘canteen culture’ some may not actually believe in is a barrier to research.
Some areas will be off limits to research for privacy and confidentiality issues.
A lot of police work takes place…