He finished his high school studies at the Colegio Nacional de Varones (today the I. E. E. Coronel Bolognesi) in Tacna and graduated as a chemical engineer at the National University of Trujillo.

He began to amass his fortune as a seller of countless products: wines from his father's small winery, socks, records, cars, tractors, shipments of pineapples from Trujillo to Tacna.

In this way, his company grew exponentially: he acquired factories producing fish flour and oil that were bankrupt and transformed them.

He owned ten fishing complexes and more than three hundred and twenty boats of all sizes, whose function was to fill the warehouses of his factories with raw materials.

[4] Nor was it fully clarified what the participation of his secretary, Eugenia Sessarego, was, who was first branded as a lover and, during the trial of the case, ended up being accused as Vilca's accomplice.

According to the hypothesis of historian Nelson Manrique, Barbie was in Chaclacayo on a stopover on his way to Bolivia, when he was identified by Herbert John, Banchero's German collaborator, and both of them blew the whistle on him.

Jewish investigator Serge Klarsfeld stated that between November and December 1971, he received a letter signed by both of them confirming Barbie's identity.