Spain’s chief anti-corruption prosecutor, Manuel Moix, is the owner of a Panama offshore company, the Spanish site infolibre revealed on Tuesday.

Moix has admitted to having partial ownership in the “Duchesse Financial Overseas” company, which owns a luxury villa near Madrid worth approximately €550,000. The company was set up in 1988 by Manuel Moix’s parents, while the villa was bought in 1990. After the death of his parents, the anti-corruption prosecutor has a 25% stake in the company, with 75% shared equally among his three children.

The opposition Socialist Party and Podemos are calling for his resignation. Although Moix initially told Cadena SER radio he would not resign, on Wednesday he said he would consult with the Attorney General making a decision on the matter.

Meanwhile, the government has come out to defend Moix. The anti-corruption prosecutor is investigating a number of corruption cases against the ruling Popular Party, including the case of a kickbacks-for-contracts scheme embroiling the Spanish Prime Minister. More recently, Moix has launched an investigation embroiling Madrid’ regional PP leadership, who are accused of embezzlement and money laundering.