Arrest in case of Ga. teens found slain execution-style Last Updated Aug 3, 2016 5:46 PM EDT ROSWELL, Ga. -- Police in suburban Atlanta say they've made an arrest in the case of two teens found shot to death Monday behind a grocery store. 20-year-old Jeffrey A. Hazelwood has been charged with the murders of Natalie Henderson and Carter Davis, both 17 and rising high school seniors. Hazelwood was arrested late Tuesday after a police surveillance team spotted him at a gas station near the Roswell Publix where the teen's bodies were found by a delivery driver, Roswell Police said Wednesday. "Since the discovery of the victims, investigators have been collecting evidence, reviewing surveillance footage, and speaking with anyone who may be able to contribute information," Roswell Police said in a statement. "This work led to the identification of Hazelwood as a suspect." Hazelwood, of Roswell, is expected to be charged with two counts of murder. Police said Wednesday they believe he acted alone. A medical examiner confirmed that the cause of death for both victims was a single gunshot wound to the head. Police executed search warrants in the case Wednesday, but it's not clear whether they were related to the arrest.