Booz Allen Hamilton interview questions

Applied online. 30 minute call with HR followed by 2.5 hour interview with three difference members of the team. Two members conducted verbal assessments giving scenarios and asking how I would go about researching them. Felt like it was one of the best interviews I'd ever had. After two weeks of ignoring my follow up emails, HR finally responded with a short email informing me the team decided to go with someone else. Was kind of surprised by the unprofessionalism given the prestige of the company.