Border Shooting Missionary
Family of missionary Nancy Davis, 59, are seen outside their home, Thursday, Jan. 27, 2011 in Pharr, Texas. Davis and her husband were allegedly atta...
Family of missionary Nancy Davis, 59, are seen outside their home, Thursday, Jan. 27, 2011 in Pharr, Texas. Davis and her husband were allegedly attacked by gunmen in a dangerous part of Mexico may have been targeted for their expensive pickup truck, because drug gangs covet the vehicles, police said Thursday. Davis was shot and later died.(AP Photo/Eric Gay)
Border Shooting Missionary
Joseph Davis, right, son of missionary Nancy Davis, 59, and other family are seen outside their home, Thursday, Jan. 27, 2011 in Pharr, Texas. Nancy ...
Joseph Davis, right, son of missionary Nancy Davis, 59, and other family are seen outside their home, Thursday, Jan. 27, 2011 in Pharr, Texas. Nancy Davis and her husband were allegedly attacked by gunmen in a dangerous part of Mexico may have been targeted for their expensive pickup truck, because drug gangs covet the vehicles, police said Thursday. Davis was shot and later died.(AP Photo/Eric Gay)
Border Shooting Missionary
This 2008 photo provided Thursday, Jan. 27, 2011, by Alan Christner, shows Nancy Davis in New Philadelphia, Ohio. Nancy and her husband, Sam, an Amer...
This 2008 photo provided Thursday, Jan. 27, 2011, by Alan Christner, shows Nancy Davis in New Philadelphia, Ohio. Nancy and her husband, Sam, an American missionary couple, were shot at in Mexico and may have been targeted because they were driving an expensive truck, police said Thursday. Nancy Davis, 59, was hit in the head and died in a Texas hospital Wednesday afternoon, about 90 minutes after the two were shot at in Mexico. (AP Photo/Alan Christner) NO SALES
Border Shooting Missionary
Family of missionary Nancy Davis, 59, are seen outside their home, Thursday, Jan. 27, 2011 in Pharr, Texas. Davis and her husband were allegedly atta...
Family of missionary Nancy Davis, 59, are seen outside their home, Thursday, Jan. 27, 2011 in Pharr, Texas. Davis and her husband were allegedly attacked by gunmen in a dangerous part of Mexico may have been targeted for their expensive pickup truck, because drug gangs covet the vehicles, police said Thursday. Davis was shot and later died.(AP Photo/Eric Gay)
BORDER SHOOTING
Map locates area near the U.S.-Mexico border where a U.S. missionary was fatally shot
Map locates area near the U.S.-Mexico border where a U.S. missionary was fatally shot
Border Shooting Missionary
This 2008 photo provided Thursday, Jan. 27, 2011, by Alan Christner shows Sam Davis in New Philadelphia, Ohio. Sam and his wife, Nancy, an American m...
This 2008 photo provided Thursday, Jan. 27, 2011, by Alan Christner shows Sam Davis in New Philadelphia, Ohio. Sam and his wife, Nancy, an American missionary couple, were shot at in Mexico and may have been targeted because they were driving an expensive truck, police said Thursday. Nancy Davis, 59, was hit in the head and died in a Texas hospital Wednesday afternoon, about 90 minutes after the two were shot at in Mexico. (AP Photo/Alan Christner) NO SALES
Border Shooting Missionary
A pray card handed out by Sam and Nancy Davis, missionaries working in Mexico, is shown in Wesfield, Ind., Thursday, Jan. 27, 2011. Nancy�Davis, 59, ...
A pray card handed out by Sam and Nancy Davis, missionaries working in Mexico, is shown in Wesfield, Ind., Thursday, Jan. 27, 2011. Nancy�Davis, 59, died in a South Texas hospital Wednesday about 90 minutes after her husband drove the couple's truck against traffic across the Pharr International Bridge after the couple were allegedly attacked by gunmen, according to a statement issued by the Pharr Police Department. (AP Photo/Michael Conroy)
Authorities in Mexico's Tamaulipas state say they are coordinating with U.S. law enforcement to launch an investigation into the killing of American missionary Nancy Davis.
State Attorney General spokesman Ruben Dario Lopez says Mexico will investigate the assault on the couple as they tried to avoid an illegal roadblock while driving in Tamaulipas, as well as the gunshot that killed 59-year-old Davis.
But Lopez said Friday the state is not investigating a murder because Davis died in the U.S.
Her husband Sam Davis frantically drove his bleeding wife for help, crossing the wrong way on an international bridge into Texas, where she later died.
The assault occurred Wednesday.
