Rep. David Rivera (R-Fla.) is facing heightened criticism Friday after the Associated Press reported that the freshman lawmaker paid himself more than $60,000 in unexplained campaign reimbursements during his time in the state Legislature.

Specifically, the Associated Press found that Rivera, who was already facing a state criminal investigation of his finances, didn’t report any details for more than one-third of the expenses for which he reimbursed himself. He simply called them “campaign expenses,” according to the AP review.

Rivera’s financial problems have caught the attention of House Republican leaders and Democratic critics.

Speaker John Boehner (R-Ohio) offered this reaction at a news conference Wednesday: “As I understand the allegations against Mr. Rivera, they don’t involve any of his Congressional service. These are activities that [happened] before he was elected, and I think we need to see how this plays out.”

Rivera’s office released a statement to the Associated Press on Thursday regarding the campaign reimbursements.