Michigan police have opened an investigation into an alleged theft involving Aretha Franklin’s estate. The alleged crime is believed to have happened before the Queen of Soul died of pancreatic cancer last August—sources told TMZ the probe involves someone inappropriately using her funds. It’s not known what was stolen or its value. Franklin’s finances have come under scrutiny since she died at the age of 76. She left no will for an estimated fortune of $80 million; the Internal Revenue Service entered “proof of claim” filings last month claiming her estate owed the federal government more than $6.3 million in unpaid income taxes. David Bennett, the lawyer for Franklin’s estate, hasn’t yet commented on the criminal investigation.