A Sacramento toddler and her father were both found dead in the man's vehicle in a rural area of El Dorado County.
FBI Special Agent John Cauthen told the Associated Press the bodies of Madeline Samaan-Fay and 49-year-old Mourad "Moni" Samaan were discovered in his green Toyota 4Runner.
The vehicle was found on private property behind a chained and locked gate.
A California HIghway Patrol helicopter spotted the vehicle. Investigators from the El Dorado County Sheriff's Department were the first to confirm two bodies inside.
"To have the case end up like this, it's tough," said El Dorado County Sheriff''s spokesman Bryan Golmitz.
Cauthen says the cause and time of the deaths is not immediately known. Investigators from the El Dorado County Sheriff's Department and the FBI are working on this case. Investigators are expected at the scene throughout the weekend, said Cauthen..
The FBI issued an Amber Alert Friday for the toddler. She was last seen Aug. 7 with her father in a Sacramento grocery store.
Mourad "lvloni" Samaan Samaan was served the day before with a notice that the girl's mother was awarded full custody of their daughter, ending what had been a joint custody arrangement, Cauthen said.
He then failed to return the child to her mother as expected.
Samaan had not been charged with a crime.
The mother didn't report the girl missing until Tuesday, the Associated Press reported.
The FBI encourages anyone with information related to this case tocall (916) 481-9110.