Mystery of McStay Family's Disappearance Ends With Arrest Today

PHOTO: The McStay family is seen in this undated family photo provided to KGTV. PlayKGTV/ABC News
WATCH Arrest Made in Case of Vanished Family Later Found Dead

A business associate of a California family that mysteriously disappeared more than four years has been charged in the four murders - including two young boys, police said today.

The remains of Joseph and Summer McStay and their sons were found in the desert near the U.S.-Mexico border last year, reinvigorating the investigation and today San Bernardino County authorities announced that they made an arrest in the case.

Charles"Chase" Merritt, who knew the family through business, has been charged with all four murders and is expected to appear in court later today, the Associated Press reports.

PHOTO: Charles Ray Merritt was arrested on Nov. 5, 2014 by the San Bernadino Sheriffs Dept. for his involvement in the murders of he McStay family in 2010.Courtesy San Bernadino Sheriffs Department
Charles Ray Merritt was arrested on Nov. 5, 2014 by the San Bernadino Sheriff's Dept. for his involvement in the murders of he McStay family in 2010.

No cause of death has been released, but the San Bernardino County Sheriff's office says that all the victims died of blunt force trauma.

The remains of Joseph McStay, 40, and his wife, Summer McStay, 43, along with their two young sons Gianni McStay, age 4 and Joseph, age 3, were found in early November 2013. When the bodies were found, the sheriff said they were otherwise intact and clothes were found in the graves, although he declined to elaborate about what items were found.

PHOTO: Two shallow graves are seen at the site on the outskirts of Victorville that contained the skeletal remains of members of missing McStay family, Nov. 15, 2013, in San Bernardino, Calif. Ringo H.W. Chiu/AP Photo
Two shallow graves are seen at the site on the outskirts of Victorville that contained the skeletal remains of members of missing McStay family, Nov. 15, 2013, in San Bernardino, Calif.

The parents and their sons, ages 3 and 4, vanished from their San Diego home in February 2010,but there were no signs of forced entry. There were signs -- rotting eggs on the kitchen counter and two pets in the backyard-- that the family left suddenly. Their car was found parked near the border off Interstate 15.

The sheriff's office reported that investigators have issued 60 search warrants and conducted more than 200 interviews in the past year since the bodies were found.

Joseph's father, Patrick McStay, told ABC News in 2010 that his son owned a company that designed interior decorative fountains and had done business in Tijuana as recent as a few months before his disappearance.

Investigators initially suspected that the family's abrupt departure was voluntary and that they had gone to Mexico for some unexplained reason. They even cited surveillance video of a family of four crossing the border on foot several days after they were reported missing and said they believed that family was the McStays.

The Associated Press and Alyssa Newcomb contributed to this report.