The brother of missing woman Leah Croucher has died, their father has said.
Ms Croucher, 20, was last seen in Milton Keynes on 15 February.
In a Facebook post, her father John said he had spoken to his son Haydon on Thursday to reassure him, almost nine months after Leah's disappearance.
He said the 24-year-old died hours later, after police arrived at his house to tell him his son was "fighting for life."
Ms Croucher was last seen by her parents at their home in Quantock Crescent on the evening of 14 February.
She told her family she was meeting a friend but police said the meeting did not happen.
CCTV showed her walking about half a mile from her home at about 08:15 the next day.
Haydon had appeared in court earlier this year accused of making threats to a man he described as Leah's ex-boyfriend.
He accepted a voluntary restraining order and the prosecution was dropped.
Mr Croucher said he had arranged to meet up with his son on Friday so they could spend the day that marked nine months since Leah's disappearance together.
He said his son was a "kind, generous, funny, witty and loving person".
He added: "Be at peace Haydon. If Leah is up there with you look after each other as always, until we get there.
"We love and miss you both terribly. Our world could not be more broken than it is now."