The alleged theft of Evelyn DeFlavis' rings from the morgue at Caritas Good Samaritan Hospital in Brockton, Mass., triggered a police investigation and an internal probe.

The pressure was apparently enough to convince whoever had the jewelry to return it to the hospital anonymously Tuesday night, The Boston Globe said Wednesday.

"In the beginning, we didn't think anybody was doing much about it, but obviously they were," DeFlavis' daughter, Alanna Doonan, told the Globe.

Doonan's mother died Sept. 10 at the age of 89. She was wearing the band and diamond engagement ring given to her by her husband, Frank, to whom she was married for 52 years before he died six years ago.