He was ordered held without bail after a judge entered a not guilty plea on his behalf.
Wes Doughty was charged with two counts of first-degree murder.
Doughty spoke only once in court, to tell bailiffs that his handcuffs were too tight.
Doughty was sought in connection with the February 18 slaying of Mark Greenlaw and Jennifer O'Connor, whose bodies were found in a cluttered Peabody home.
A spokesperson for the Essex County DA previously said that O'Connor's death was caused by sharp death founds to the head and neck, but later clarified that it was the neck and torso.
There's still no word on a motive for the murders.
Another suspect, Michael Hebb, has reportedly pleaded not guilty to murder charges in connection to the killings.
Doughty's lawyer said only the state's version of events has been made public, and he expects more facts to come out. Authorities say Doughty drove more than 900 miles to SC where he was arrested after being questioned for panhandling.
Police think Doughty committed a carjacking in Boston before heading to the Upstate.
The man Doughty allegedly carjacked told police Doughty admitted killing the couple because they gave heroin to his godfather. Last Friday, Spartanburg County Sheriff's investigators spotted Doughty in Boiling Springs, S.C. and arrested him on soliciting charges and then checked national databases and learned he was wanted for the murders and the carjacking.