A mysterious man who no one claims to know was caught on video slipping $20 bills to volunteers supporting embattled Colorado state Sen. Angela Giron, who is facing a recall effort over her support for tough new gun-control laws.

Through a spokesman, Giron said she doesn’t know the man, who approached three people waving pro-Giron signs at a rally in Pueblo last weekend, and gave them each a $20 bill.

“The volunteers don’t know who the guy is,” Chris Shallow, campaign manager of Pueblo United For Angela, told 9News. “He didn’t tell them his name. Sen. Giron doesn’t know who this guy is. I am treating this money as an anonymous contribution.”