Published: 2017-11-25 15:20:22 BdST
Police arrested a man in Berlin on Monday suspected of receiving the 86 stolen items, which include Lennon's last diary that ended on the day he was shot and killed in New York on Dec 8, 1980.
Hagen rejected suggestions that Ono might have lent or given away the objects: "The diaries especially ... were also treated by Yoko Ono as something sacred. And the idea that she would have given away three original diaries, especially the one that ends on the very day Lennon died, can be completely ruled out."
German police presents stolen diaries and other items belonging to former Beatle John Lennon that were recovered, during a news conference in Berlin, Germany, 21 Nov, 2017. Reuters
The Berlin police was alerted after they were found by the administrator for a bankrupt auction house, which had previously valued the objects at 3.1 million euros ($3.64 million).