The businessman, head of a construction company in the province of Valladolid, filed the complaint on May 8. The victim made a payment of €10,000, supposedly for construction material (concrete), after receiving an email that appeared to come from one of his architects.

The fraud was completed when the victim transferred the funds to an account that was not the usual one for the supplier company, realizing the scam only when he contacted the manager of the other company to confirm the transfer.

Investigators from the Cybercrime Group of the Provincial Judicial Police Brigade of Valladolid determined that the criminals had used the method known as Man in the Middle. This technique involves accessing the company's communications using phishing or malware, intercepting emails, and modifying the bank details of legitimate invoices.

The arrests took place in Igualada and Baza (Granada). The two arrested individuals acted as 'mules', moving the stolen money in exchange for a commission before it was transferred to accounts abroad. The investigation concluded in early December, managing to recover €4,638.