Foster was charged following a “significant policing operation” around Ger-y-Nant, where he lived, and which is managed by the Valleys to Coast housing association, where Barnfield worked.
Ger-y-Nant is a sheltered housing and retirement complex of 13 flats, has non-resident management staff and accepts new residents aged 60 or over, according to an online profile.
Eleanor was described by her family as the “most loving” mother and “bravest person in the world”.
In a tribute issued through police at the time of her death, they said: “She meant everything to us and will be forever loved and missed deeply by her devoted family and friends.
“She was our rock.”
Jo Oak, chief executive of Valleys to Coast, previously said the organisation was “devastated by the tragic death of our colleague”.
“Eleanor was a much-valued member of the Valleys to Coast team, and her loss has been deeply felt by everyone who knew and worked alongside her.
“She made an important contribution to our organisation and to the communities we serve, and she will be remembered with great warmth and affection by her colleagues.