From the short pamphlet by Chojnowski outlining the basic sequence of events and the evidence of the fraud:

Last public interview with Fr. Augustin Fuentes in December 26,

1957. After this interview, Sr. Lucy was not allowed to be
interviewed anymore for the next several decades.
2. The interview was not published until May 1958.
• Fr. Fuentes described Sr. Lucy’s appearance as “very sad,
pale, and drawn.”
• She told Fr. Fuentes: “The chastisement from Heaven is
imminent. The year 1960 is on us, and then what will happen?
It will be very sad for everyone, and far from a happy thing if
the world does not pray and do penance before then.”

3. After the Fr. Fuentes’ interview was published, the Diocese of
Coimbra, on July 2, 1959, released a disconcerting note publicly
disavowing Fr. Fuentes along with the following words of
correction, supposedly from Sr. Lucy:
• “I know nothing, and could therefore say nothing, about such
punishments, which are falsely attributed to me.”
• The note closes with these words: “Sister Lucy has nothing more to say
on Fatima.”

That last line has a bit of an ominous ring to it, doesn't it?

Then Pius XII died in October, 1958. Then:

Sister Lucia not publicly seen again until May 13, 1967 on the 50th Anniversary of Fatima
with Paul VI.
2. Strikingly, in her 1967 appearance before the world “Sr. Lucy” appeared jovial and in good
health – even gesturing to the cheering crowd as if prodding them for more adulation.

And what I didn't quote is that the photographs taken of ... someone ... at this event are the first ones that are definitely not photos of Sr. Lucy. Whoever the person is in these photos claiming to be Sr. Lucy, is scientifically proved to be the same person as in all the photos of "Sr. Lucy" until the death of the imposter in 2005 or whenever it was. There are no extant photos of the real Sr. Lucy after 1957 at the latest, and I suspect not after her visit to Fatima in 1946.

If the real Lucy disappeared after 1957, then Dr. C. is wrong in asserting that the imposter only appeared on May 13, 1967 and thereafter.

I still have to wonder what the imposter's handlers were trying to accomplish by "confusing things."  Obviously, her appearance would have been for one reason alone- to corroborate the authenticity of previous papal consecrations

No record of sister Lucy appearances anywhere between 1957 and 1967 when they pranced Sr Lucy ll out with Paul Vl. She may have been killed or died at anytime in between.