Well I'm not sure on the Forensic Specialist Position specific questions, but I recently had an interview that consisted of generic questions like 'Explain one time you had to make a hard decision and how you handled it' that kind of thing. I would recommend researching on google basic interview sample questions and preperations as that helped me a lot. As for scenario's I don't think they would ask you very specific 'what are you suppose to do in this scenario' kind of question (especially if it's a trainee or level 1 position as they'll train you on the job). The most I got that was crime scene technician specific when I had my interview was stuff like 'Do you have any problem with being near bodies or working outdoors in bad weather' that kind of specific questions they'll probably ask, but scenarios are highly unlikely and if they do ask 'I don't know I would ask the supervisor first' would be a great answer as it's ok not to know everything, they'll train you, asking for help is better then guessing the answer and doing it wrong anyways. Hope this was helpful!