Amy Robach

Yes, and imagine being the parents of Ellen Greenberg, and you find out that your 27-year-old daughter, who is seemingly happy, engaged, she has a fiancé, she's a schoolteacher, that all of a sudden she is found in her kitchen in Philadelphia with all of these stab wounds, including a 10-inch knife in her chest, that she died by suicide.

And not by homicide.

That has never sat well with her parents who have said, our daughter did not commit suicide.

We know that.

She was murdered.

However, her official cause of death is suicide.

And that's a problem for the parents.

And they feel like, and they have said this is a victory for them because this week, on Thursday, we are talking almost 15 years to the day because Ellen Greenberg died on January 26, 2011.

But on Thursday, the U.S.

Attorney's Office issued subpoenas around this case.

They are apparently opening an inquiry into

into whether Ellen Greenberg's death was properly investigated.

And that's important because they're not necessarily going back and saying, we're going to change or potentially change her manner of death.

But what they're doing is they're saying this investigation

possibly was not conducted properly.

The family has said the investigation was botched from the beginning.

They're mincing no words.

But apparently the U.S.

Attorney's Office is seeking documents from the Philadelphia Police Department and other agencies.

That's the information we received.