OKLAHOMA CITY - Two teenagers have been arrested, each on a first-degree murder complaint, in connection to the disappearance of Piedmont teenager, Anne Hill.

Hill, 16, was reported missing in April, 2014. Initially the investigation was assigned to the missing persons unit. But the case has been reassigned to the homicide unit after police said there is a reason to suspect foul play.

About five days after Hill went missing, her car was found abandoned in an Edmond park, raising concerns for police. A search warrant was issued at an Oklahoma City apartment complex in connection with Hill's disappearance.

During the investigation, Oklahoma City Police Homicide investigators named two suspects in this case, 16-year-old Chadd Raymond and 16-year-old Chloe Thomas.

According to police, Thomas came to police headquarters Friday afternoon, was interviewed by investigators and subsequently arrested. Saturday morning, Raymond was arrested at his home in northwest Oklahoma City. Both suspects face a first-degree murder complaint.

Police said the investigation is ongoing. To protect the integrity of the investigation, police said they will not be able to discuss further details at this time.

Anyone with information that could aid investigators should call the Homicide Tip Line (405)-297-1200.

Officials with the Edmond Public Schools confirm that Raymond is currently enrolled at Santa Fe High School, and that Thomas withdrew from the district on April 14, 2014. She attended Boulevard Academy from August, 2013 to April 14, 2014. 

Edmond school officials released the following statement concerning this case,

"Edmond Public Schools is shocked and saddened to learn that current student, Chadd Raymond, and former student Chloe Thomas, were each arrested on murder complaints this past weekend in connection with the disappearance of Piedmont teenager, Anne Hill. Our thoughts and prayers are with Hill's family and friends during this extremely difficult time.

Chadd Raymond is currently enrolled at Santa Fe High School. He also spent eight months at the district's alternative high school, Boulevard Academy from Oct. 2012 to May of 2013.

Chloe Thomas withdrew from the district on April 14, 2014. She attended Boulevard Academy from Aug. 2013 to April 14, 2014.

Boulevard Academy is an alternative education program that focuses on academic credit recovery with a learning environment that features smaller class sizes."