Updated

The husband of Spain's Princess Cristina, is being questioned again by prosecutors in the tax-and-embezzlement trial in which he, the princess and 16 others are accused.

Inaki Urdangarin's testimony Wednesday will be followed by that of another defendant before Cristina, who faces two charges of tax fraud, testifies.

The case centers on accusations Urdangarin used his former title of Duke of Palma to embezzle about 6 million euros ($6.6 million) in public contracts through a non-profit institute he co-ran.

In his first day of testimony on Friday, Urdangarin — who faces a possible sentence of 20 years — said he couldn't recall many of the issues he was questioned about.

Cristina, sister of King Felipe VI, is the first Spanish royal to face criminal charges since the monarchy's 1975 restoration.