Milwaukee Property Manager Fired and is not Transferring Tenant Security Deposits

[JJ Bliss]

Good afternoon,

Anyone know what legal action I can take in Milwaukee, WI as I fired my property manager and he is not Transferring our tenant's security deposits either back to us or to our new property managers?  Is this just straight theft and do the tenants need to sue him since it's their money or can I?

Thanks,

JJ