But then came a startling discovery at the James H Cole funeral home: The woman was still alive.
"Our staff confirmed she was breathing" and called a Detroit emergency medical crew, the funeral home said in a written statement.
The woman was taken to a hospital. Her mother said the bizarre events left her searching for words to express her feelings.
"My heart is so heavy. Someone pronounced my child dead, and she's not even dead," the mother told WDIV-TV, which didn't identify her by name.
There was no official information on the woman's condition Monday. Authorities haven't released her name.
"We couldn't believe it," said Dave Fornell, deputy commissioner of the Detroit fire department, whose first responders were called to the funeral home.
The fire department said it was summoned to the woman's home because she was unresponsive. Southfield said it's conducting an internal investigation but insisted that the fire and police departments followed procedures.
- AP