Multi-family unit but no financials

[Evan Miller]

Hello bigger pockets, I have come across a multi-family unit 6-plex. The property has been in the family for a long time and was given to the son after the father died. The son has been handling the property but has done a horrible job in keeping financial records. No standard rent roll or P&L. I know that evealuating mulitfamily is based on income but if he os not able to provide proper financials what should I do?