Discover Bank Account Or Service Complaint

Discover Bank account or service department,

Savings account Deposits and withdrawals New York

I got my check stolen on -/-/2016.it belongs to my discover saving account ( - ), the check no is -.i talked with discover fraud department.they said if I donot file police report, I would not get my money back.Then when I file police report, the police said they need my check info.however, discover bank shut down my former account, I could n't see all of former information of my account.i contacted with them more than 20 times. First, discover bank said - fraud liability ... why I could not get my money back? Second, some of my coworker has the same issue, they all get their money back? why I could not? Third, if they donot give me my former account info, how can I file police report?