NEW YORK ( CNN ) -- Nonnie Dotson , a nurse in the U.S. Air Force , was decompressing from a hard-fought child support battle when she disappeared hundreds of miles from her home base . U.S. Air Force nurse Nonnie Dotson disappeared on the way to the mall on November 19 , 2006 . Dotson , 33 , was staying with her brother at his home outside Denver , Colorado , when she vanished on November 19 , 2006 . She was supposed to meet friends at the mall for a smoothie . She never showed . The single mother and her 16-month-old daughter , Savannah , lived in San Antonio , Texas , where Dotson worked on a military base as an intensive care nurse . They were staying with Dotson 's brother , Tony , for a few days . Watch why Dotson 's disappearance puzzles investigators » . Dotson had recently emerged from a court battle with Ed Vehle , Savannah 's father . Vehle , who also lived in San Antonio , was ordered by the court to pay $ 10,000 in back child support , as well as $ 900 each month . Dotson won the court order two months before she disappeared . Dotson was just months away from completing her military duty and was trying to decide whether she would move back to her hometown in Colorado or remain in San Antonio . Vehle had declared he had no interest in being a part of their lives . The two met in 2004 and the relationship ended when Dotson became pregnant . Vehle did not want her to have the baby , she told friends at the military base . The friends spoke on condition that their identities would not be made public . Vehle is not a suspect or person of interest in the case , police said . Because things appeared to be going well in Dotson 's life , her sudden disappearance is a mystery to her family and to police . She was hundreds of miles away from home in a safe Denver suburb . She left her brother 's home on Sunday afternoon , and the mall was within walking distance , Tony Dotson said . `` She asked me to look after Savannah for a couple hours and she walked out that door and we never saw her again , '' Tony Dotson added . `` She would never have intentionally left Savannah behind like that . '' Police agree . Since Dotson vanished , there has been no activity on her bank accounts , credit cards or cell phone , police said . Her case is still an open missing persons investigation being handled by the Jefferson County homicide department . `` Unfortunately , we have no real leads as to who is responsible for Dotson 's disappearance , '' said sheriff 's office spokeswoman Jacki Kelley . `` She could be alive and being held against her will . She could have been kidnapped and then murdered . We are not ruling anything out at this time , '' Kelley said . For several weeks after Dotson 's disappearance , Vehle refused to answer questions . He retained counsel . In mid-December 2006 , Vehle and Jay Norton , his attorney , met with police , answering all their questions . Norton said they were able to provide investigators with receipts and cell phone records accounting for Vehle 's whereabouts . Police confirmed that Vehle was nowhere near Colorado before , during or after Dotson 's disappearance . After Dotson 's disappearance , Vehle decided to go to court to pursue full custody of his daughter . Dotson 's parents had been taking care of Savannah . The court last year gave Vehle shared custody with Dotson 's parents . Family and police urge anyone with information about the whereabouts of Nonnie Dotson to call the Jefferson County Sheriff 's Office tip line at ( 303 ) 271-5612 . Nonnie Dotson is 5 feet 3 inches tall , weighs 115 pounds and has brown hair and brown eyes .
Karen Dotson was visiting family in suburb of Denver , Colorado . She was an Air Force nurse based in San Antonio , Texas . She won court case before November 2006 disappearance . Have a tip ? " Jefferson County Sheriff 's office at ( 303 ) 271 - 5612 .