Florida ? Yessica Guerrero Escobedo and Jose Luis Escobedo were high school sweethearts, a relative said, who fell in love and married. Recently, they packed up their two children and left their Texas home, headed for Florida in search of a new life.

On Saturday, authorities were trying to figure out how they were fatally shot along Florida’s Turnpike in Port St. Lucie, about 100 miles north of Miami. The body of Yessica Guerrero Escobedo, 25, was found Friday clutching her two sons in an apparent effort to protect them. Her husband, who was to turn 29 Saturday, was found nearby.

Lisa Salazar, a relative in Brownsville, Texas, said the couple, married for three years, didn’t have any enemies. She showed photos of the family, including the 3- and 4-year-old sons, at a news conference.

Investigators were watching 480 hours of surveillance tapes from toll booths along the turnpike hoping to spot any clues to lead to the suspects. Bullets found at the scene also were being analyzed to see if the same kind had been used in any other crimes.