Jeffery L. Fairley, 18, was picked up at a friend's house Thursday in Meridian.
The arrest by Meridian police came after an around-the-clock investigation, underway since the bodies of James Tingle, 75, and Johnny Crump, 59, were found in their residence Monday afternoon.
Investigators say the fact the suspect used a cell phone belonging to one of the victims helped police.
"He used the victim's cell phone to call a person that he knew for a ride, for some help," said detective Darrell Theall. "That person in turn hung up the phone and said don't be calling me this early in the morning. That person had no idea what he had done. He told us he hadn't told anybody of the crimes he had committed."
The two victims were shot multiple times each and police say the murders took place between 2:00 a.m. and 4:00 a.m. Monday morning. The suspect apparently had no connection with the victims.
Chief Benny Dubose had nothing but praise for his department's fast work.
"The members of the Meridian Police Department Violent Crime Unit standing behind me were responsible for gathering the evidence, interviewing witnesses and the suspect," said Dubose, "all of which led to the arrest of Mr. Fairley. I think they should be commended for the work they did and the hours they put into this case to bring it to a quick resolve."
Fairley is charged with two counts of capital murder and one count of vehicular theft. He is being held without bond.
Robbery was the apparent motive in the case. No other arrests are expected.