Cristal Taylor, Dirk Nowitzki's 37 year-old girlfriend, was arrested at his home after police received information from a Dallas officer working with an FBI task force, authorities said.

Police said that Taylor may have been using as many as eight aliases, NBC Channel 5 reported. Police wouldn?t speculate on Taylor?s relationship with the NBA All-Star, NBC Channel 5 reported.

Sarah Melton, a spokeswoman for the Mavericks, said Taylor was ?just staying at his house,? NBC Channel 5 reported. Sources told nbcdfw.com that Taylor is Nowitzki?s girlfriend.

There is also a report that Taylor is pregnant and engaged to Nowitzki.