The Avalon at Lexington Hills are apartment buildings that were converted in 2007 on or at least near part of the former site of the Metropolitan State Hospital. This psychiatric hospital was featured in the TV Series, "Scariest Places on Earth". Paranormal New England investigated in 2013 and encountered several reports of paranormal activity and events.
In 1978 a patient murdered another patient here.
I can find no reports of ghosts at the actual apartment buildings.