CHICAGO (CBS) — Former Chicago priest Daniel McCormack faces a new challenge on Monday

A trial begins to determine whether he is legally a sexually violent person.

If so, he could be incarcerated for the rest of his life.

McCormack served a five-year prison sentence for molesting several boys while he worked at Saint Agatha Roman Catholic church.

He’s now in a mental institution.

The allegations that ultimately led to criminal charges against McCormack dated back to August 2005, but he was not removed from his post until the charges were approved three months later.

At the time, Cardinal George conceded that he should have launched an investigation against McCormack sooner.

In early February 2006, George issued a letter of apology that said “our response … was sorely inadequate.”

Four of McCormack’s victims received $2 million each in a settlement with the Archdiocese of Chicago.