The PCI Security Standards Council will not conduct forensics investigations either directly or through a third party in the event of an account compromise.
Article Number 1094
How do I contact the payment card brands?
Can an entity be PCI DSS compliant if they have performed quarterly scans, but do not have four “passing” scans?
Are compliance certificates recognized for PCI DSS validation?
Does PCI DSS, PA-DSS, or PTS apply to ATMs?
Does PCI SSC provide a list of PCI DSS-compliant service providers?