I'm drawing a blank. A younger woman at the time of airing was trying to find her brother. They may have been twins, and the brother may have had a disability such as being deaf, but I could be confusing that aspect with some other case, so don't get too fixated on that. They were split up and placed with different families. If I recall, her adoptive family was fine.

It had been important to her that he could attend her high school graduation, but when she wrote him a letter to invite him, it was returned to sender.

What I certainly do remember was that she had found an address on some more recent documentation, but it turned out to be a homeless shelter in L.A. The brother hadn't been seen there for some time, and there has never been any update.

I recall that the siblings were born in the 1960s.

I did some digging on this case several yeas back, and I can't seem to find my posts on the forum.

The Siblings of Martha Smith

https://unsolvedmysteries.fandom.com/wiki/The_Siblings_of_Martha_Smith

Thanks. Seems like someone else solved it. Too bad she never got the reunion. They both passed away so young.

So much happened in that segment that it feels like three Lost Loves rolled into one.

Yes, they both did die young.