TAMPA, Fla. -

A Tampa woman is heading to federal prison for 15 months after her conviction on charges of conspiring to commit marriage fraud.

U.S. District Judge Virginia M. Hernandez Covington handed down the sentence on Thursday in Tampa.

The U.S. Attorney's Office says 55-year-old Cassandra Hamilton arranged marriages between U.S. and Jamaican citizens "for the purpose of enabling the Jamaican citizens to obtain residency and citizenship."

Court documents say she engaged in marriage fraud in excess of 10 times over a span of several years. She was paid for her involvement in arranging the marriages.

The case was investigated by U.S. Immigration and Customs Enforcement's Homeland Security Investigations and U.S. Citizenship and Immigration Services.