SALT LAKE CITY — Federal prosecutors say a Utah truck driver had four other victims in addition to the two women he is accused of keeping as sex slaves in his semi-trailer as he drove across the country.

Some of the new accusations against defendant Timothy Jay Vafeades, 54, date back 20 years.

In two of the new incidents detailed in court documents filed Monday, the federal prosecutors say Vafeades lured the women to his truck, then forcibly altered their appearances and ground down their teeth while holding them prisoner for months.