Forensic Recommendations

I have a friend who believes all of his devices including android phones, windows desktops, and even a mac have been "hacked". He's not a very technical person and I'm not physically able to evaluate his situation, nor do I know anything about the discipline of digital forensics.

Could anyone recommend a firm or person that investigates and reports on these types of incursions? Not looking for legal-level reporting (or cost), just someone who can give a comprehensive analysis.