(CNN) -- A second person tried to warn authorities about alleged abuse of a Florida brother and sister days before one was found dead and the other doused in dangerous chemicals, according to a child abuse hotline call released this week.

The caller told Florida authorities that he knew Jorge and Carmen Barahona, and he was worried about the couple's 10-year-old adoptive twins, according to the phone call released by the Florida Department of Children and Families.

The caller said he was worried that something sinister had happened to the 10-year-old girl because Jorge Barahona and Carmen Barahona could not explain where the girl was.

"(Jorge Barahona) doesn't come out with a straight answer which is worrying me so much that something might have happened to that little girl," said the caller, who was not named.

The caller said he was also worried about the Barahona's lack of care for a gaping wound on the boy's face, around his lips.

"It is questionable why this kid was not taken to a medical facility when the wound obviously needs stitches," the caller said.

This call to a Florida abuse hotline was made two days before the twins were found in a pest control truck on the side of Interstate 95 in West Palm Beach, Florida.

Jorge Barahona, the twins' adoptive father, has been charged with attempted first-degree murder with a weapon and aggravated child abuse with a weapon in the case.

The twins' adoptive mother, Carmen Barahona, has not been charged in the case, but police say they are looking into everyone who had access to the children.

An independent panel has been asked to investigate the actions of Florida's child protection system in the case.

Authorities have said Jorge Barahona parked his pest control truck on the side of I-95 on February 14. A roadside ranger said he found Barahona beside the truck and his adopted son ill inside the vehicle, which was filled with toxic chemicals. The body of his adopted daughter, Nubia, was discovered in the back of the truck in a plastic bag.

The boy was taken to a hospital to be treated for severe burns.

Earlier this week, Florida officials released another abuse hotline call from a therapist who also tried to warn authorities about alleged abuse.

"When they are being punished, they are being taped up and with their arms and legs and put in a bathtub," said the therapist, who was not named. "They are in there all day and all night, and she undoes their arms when they eat."

That call was made four days before the twins were found in the truck.