Oops! Doctor who "proved" the identify of "Sister Lucy" in 2003 states that the reason he investigated the identity of "Sister Lucy" was because CARLOS EVARISTO WENT TO THE PORTUGUESE POLICE BECAUSE HE BELIEVED THAT THE WOMAN THAT HE INTERVIEWED IN 1992 WAS A FRAUD.
Youtube in which Carlos Evaristo presents Dr. Zugibe as an expert who "disproved" the idea of there being an Imposter Sister Lucy.
Here is the part of the interview, with Dr. Zugibe --- first published in the Wanderer in 2003 and then later republished by EWTN --- in which he mentions Mr. Evaristo's going to the police over what he realized was an imposture.
Here is the full interview: