By JENNIFER HORTONThe Wilson PostA suspect in a double homicide that occurred Tuesday in southwest Wilson County has been charged with counts of first-degree murder and remains in jail under $500,000 bond for each count.Johnathan Michael Bousquet, 26, of Mt. Juliet, was arrested early Wednesday morning at his sister’s home in LaVergne by the Wilson County Sheriff’s Department with the assistance of the Rutherford County Sheriff’s Department.The suspect is expected to be arraigned soon on the charges in General Sessions Court.Bousquet is charged in the shooting deaths of Markeith Mapp, 17, and a student at Antioch High School, and Darin Cripps, 23, of Nashville.The incident involved a shoot-out that occurred during a drug deal on Stewarts Ferry Pike in southwest Wilson County.Bousquet was thought by authorities to be the driver of a white Chevrolet Blazer SUV seen on Hobson Pike in Davidson County, about 4 miles from the Stewarts Ferry Pike location.After an all-night search for the vehicle, Bousquet was arrested at his sister’s home about 5:30 a.m., Wednesday.Authorities responded to a call on Stewarts Ferry Pike regarding a shooting and a car wreck at approximately 2 p.m., Tuesday.“After the investigation started, we learned that we had two people who had been shot at the location on Stewarts Ferry Pike,” said Sheriff Terry Ashe.Mapp was found shot several times in his automobile that was wrecked in a nearby creek. He was reportedly driving a Chevrolet Impala. Wilson County Emergency Management Agency personnel tried to save Mapp, Ashe said, but were unsuccessful and he died at the scene.Cripps, the second suspect, “was found by officers on Hobson Pike in Davidson County lying on the side of the road with a female and another man. Officers tried to perform CPR on the suspect,” Ashe said, but they were also unsuccessful and Cripps died.“It is believed through our investigation, that this was a result of a drug transaction that went terribly wrong. It is also believed, by investigation of the Sheriff’s Department, that the robbery of a drug dealer was planned. The shoot-out took place in the car belonging to Mapp. A close-range exchange of gunfire took place from the front seat to the back seat while two other passengers were present,” Ashe said.The sheriff said narcotics were found at the scene. He said investigators believe gunfire erupted between Mapp, driver of the Impala, and Cripps, who was seated in the back of the vehicle.A .45-caliber weapon believed to have been used by Mapp was recovered, but the sheriff noted that authorities continue their search for a .357 magnum they think was fired by Cripps.Ashe said late Tuesday that two females were taken into custody and interviewed. So far, no charges have been filed against them.The sheriff said that the investigation is continuing and is being led by Major Don Hamblen.Ashe said he wanted to thank everyone who has helped in the investigation. “I am very proud of the hard work done by the Wilson County Sheriff’s Department detectives who have worked around the clock. We are also very appreciative of the assistance we received from the Rutherford County Sheriff’s Department, Metro Police Department, THP, CRT Team and Wilson County Emergency Management Agency,” he said.Editor Jennifer Horton may be contacted at firstname.lastname@example.org. The arrest of the suspect was first reported on Wednesday at www.wilsonpost.com.