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Detectives en route to pick up 3rd officer in North Texas when convict escaped during pit stop

  • Grapevine Police Dept. PIO Sgt. Robert Eberling speaks to the press at a mobile police command center in a parking lot  in Grapevine, Texas, Tuesday Feb. 12, 2013.  A manhunt is under way for Alberto Morales, a prisoner convicted of kidnapping and sexual assault, who stabbed one of two police escorts and escaped in the Dallas area as he was being transferred from Florida to Nevada, police said.  (AP Photo/The Dallas Morning News,Kye R. Lee)  MANDATORY CREDIT; MAGS OUT; TV OUT; INTERNET OUT; AP MEMBERS ONLY

    Grapevine Police Dept. PIO Sgt. Robert Eberling speaks to the press at a mobile police command center in a parking lot in Grapevine, Texas, Tuesday Feb. 12, 2013. A manhunt is under way for Alberto Morales, a prisoner convicted of kidnapping and sexual assault, who stabbed one of two police escorts and escaped in the Dallas area as he was being transferred from Florida to Nevada, police said. (AP Photo/The Dallas Morning News,Kye R. Lee) MANDATORY CREDIT; MAGS OUT; TV OUT; INTERNET OUT; AP MEMBERS ONLY  (The Associated Press)

  • The mobile police command center is  set up in a parking lot  in Grapevine, Texas, Tuesday  Feb. 12, 2013. A manhunt is under way for Alberto Morales, a prisoner convicted of kidnapping and sexual assault, who stabbed one of two police escorts and escaped in the Dallas area as he was being transferred from Florida to Nevada, police said. (AP Photo/The Dallas Morning News,Kye R. Lee )  MANDATORY CREDIT; MAGS OUT; TV OUT; INTERNET OUT; AP MEMBERS ONLY

    The mobile police command center is set up in a parking lot in Grapevine, Texas, Tuesday Feb. 12, 2013. A manhunt is under way for Alberto Morales, a prisoner convicted of kidnapping and sexual assault, who stabbed one of two police escorts and escaped in the Dallas area as he was being transferred from Florida to Nevada, police said. (AP Photo/The Dallas Morning News,Kye R. Lee ) MANDATORY CREDIT; MAGS OUT; TV OUT; INTERNET OUT; AP MEMBERS ONLY  (The Associated Press)

  • Grapevine Police Dept. PIO Sgt. Robert Eberling speaks to the press at a mobile police command center in the parking lot   in Grapevine, Texas, Tuesday Feb. 12, 2013. A manhunt is under way for Alberto Morales, a prisoner convicted of kidnapping and sexual assault, who stabbed one of two police escorts and escaped in the Dallas area as he was being transferred from Florida to Nevada, police said.  (AP Photo/The Dallas Morning News, Kye R. Lee)  MANDATORY CREDIT; MAGS OUT; TV OUT; INTERNET OUT; AP MEMBERS ONLY

    Grapevine Police Dept. PIO Sgt. Robert Eberling speaks to the press at a mobile police command center in the parking lot in Grapevine, Texas, Tuesday Feb. 12, 2013. A manhunt is under way for Alberto Morales, a prisoner convicted of kidnapping and sexual assault, who stabbed one of two police escorts and escaped in the Dallas area as he was being transferred from Florida to Nevada, police said. (AP Photo/The Dallas Morning News, Kye R. Lee) MANDATORY CREDIT; MAGS OUT; TV OUT; INTERNET OUT; AP MEMBERS ONLY  (The Associated Press)

Authorities are searching for a convicted sex offender who escaped near Dallas while being transferred from Florida to Nevada.

Police say 42-year-old Alberto Morales escaped Monday after stabbing one of two Miami-Dade detectives who were transporting him. They had stopped at a store while driving Morales from Houston to the Dallas area to pick up a third colleague for the rest of the trip.

Police say Morales was so disruptive on the flight into Houston that they decided to drive him the rest of the way. Policy requires there to be three officers for a ground transfer.

The Associated Press erroneously reported Tuesday that the officers had flown into the Dallas area.