Wael Ali was arrested Thursday in the 2007 slaying of his twin brother in Howard County. (BALTIMORE SUN)

Wael Ali, who has been living in Marietta, Ga., was arrested Thursday by the Cobb County Sheriff’s Office, four years after his brother Wasel Ali was found dead.

“This arrest demonstrates that our detectives never give up on a case,” Howard CountyPolice Chief William McMahon said in a news release. “Our cold case unit has continued this investigation to ensure that justice would be served in this tragic murder.”

On Aug. 27, 2007, the body of 19-year-old Wasel Ali was discovered on a secluded dirt path in the woods behind the 12000 block of Green Meadow Drive in Columbia. An autopsy showed he died as a result of a neck injury.

Identical twin brothers Wael and Wasel Ali. Wael Ali has been charged with the 2007 death of Wasel. (The Baltimore Sun)

According to police, about 25 minutes after leaving the mall Wael Ali called a friend and said that his brother had gone missing. Police say witnesses reported that Wael Ali was “frantic” and crying. The Ali family reported Wasel as a missing person to police about four hours later.

The four-year investigation culminated in Wael Ali’s arrest Thursday, when he was taken into custody in Georgia.

For more information about the Wali brothers and the investigation history, visit BaltimoreSun.com.