How long does our credit card company keep our transaction activity up to? a year? 5 years?

I need to report an identify theft that happened about 5 years ago and I need the transactions the thief made using my identity in order to report it to the police. I was away from the country for 5 years when all that happened and I wasn't aware of that and now my credit report is the worse of all and the collection agencies are after me. Do CC company keep the transaction long in their system in order for them to be able to investigate in the future? Please help!