FBI agents have reportedly seized records of threatening calls made by Dirk Nowitzki's ex-girlfriend to the player's attorney.

Crista Taylor's prison phone calls contained threats and demands for money from Nowitzki, according to a pair of sources.

News of the FBI's involvement came on the same day in which court documents surfaced that Nowitzki is seeking sole custody of Taylor's unborn child, assuming it is proved that he is the father.

Via ESPN

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