A warrant for Long's arrest was issued after police in Baltimore found the couple dead inside their home Sept. 10.
Police there said the couple had probably been dead since Sept. 8
Long lived with the victims but was not at the residence when police arrived to check on the couple, according to the Oklahoma County affidavit.
The couple's vehicle was missing, and police found evidence in Long's bedroom — including bloody clothing — linking him to the slayings, police reported.
The victims died of blunt- and sharp-force trauma. The murder weapons were a pair of 20-pound dumbbells and a knife, Baltimore County police reported. The knife has not been recovered, police said.