A Mississippi man faces criminal charges after police allege he raped his 22-year-old daughter “for years,” and eventually became a grandfather to his own child.

Calhoun County Sheriff Greg Pollan told WTVA the victim contacted police June 16 to report that her father, Jose Antonio Maldonado, 48, had raped her for years, first when she lived in Florida, then in Mississippi.

“Shocked is an understatement,” Pollan said. “This isn’t something we work very often, especially here in Calhoun County.”

“We truly feel for the family right now,” he added. “We’re happy she worked up the courage to tell police.”

When deputies responded to the woman’s call, they found her distraught with a friend, who said, “She’s got something she wants to get off her chest. She can’t take it anymore,” The Clarion-Ledger reports.

The woman told police Maldonado raped her numerous times in Florida, where he fathered the victim’s 8-month-old child, and continued the abuse in Mississippi when she moved back.

Police arrested Maldonado June 16 and it took four days to sort through a list of aliases to determine his real identity.

“When we went to talk to him, he admitted what he had done before we could even ask, Pollan told the Daily Journal. “He said, ‘I know why you’re here. I did it.’”

Pollan said they ran his finger prints through the national Automated Fingerprint Identification System and located an FBI file on him. From there, they determined he is a Puerto Rican born in the Bronx, New York in 1968, according to the news site.

“When we ran his name, he came back with 15-plus aliases, 10-plus Social Security Numbers and 10-plus dates of birth,” the sheriff said. “One report led us to believe he was born in Mexico, so we had to dig further to find out if he was an alien or a U.S. citizen.”

As Maldonado sits in jail on a $100,000 bond – charged with rape and possession of marijuana in a motor vehicle – sheriff’s officials are working with Florida authorities to continue their investigation.

“There will be a DNA test done at some point in time, and we have witnesses helping corroborate these things,” Pollan told The Clarion-Ledger.  “We have other incidents in which he (allegedly raped his daughter) here in Mississippi as recently as a few weeks ago.”

“The case is still under investigation, but we feel there could be additional charges and possibly additional victims,” he told the Journal. “We are working with other jurisdictions but feel we should be able to move forward within a week.”

Pollan credited the AFIS system for helping to quickly sort through Maldonado’s history of fake names, which took much longer under the old paper system.

“What used to take weeks or months now take hours, or less. If someone is in the system, we normally have a reply within 10 minutes,” he said. “We have used AFIS many times since we got it two years ago. It helps a lot when you have a high population of migrant workers.”