The Negotiator (1998) on Netflix

As a decorated hostage negotiator, Lieutenant Danny Roman has made a career out of talking down dangerous men who don't listen to reason. But he goes off the deep end himself when he is framed for the murder of a colleague investigating corruption in their department. Convinced that the Internal Affairs office contains evidence that can exonerate him, Roman takes everyone inside the building hostage. Roman demands Lieutenant Chris Sabian, known for his anti-violence creed, be brought in to negotiate thinking it will buy him time. When Sabian's attempts for a peaceful resolution are constantly undermined by local authorities, he begins to suspect there may be method to Roman's madness.