Jesse Edwards Reynolds appeared in court in Saint John on Tuesday in connection with the death of Jessica Ann Miller, 20, according to police.
He has been charged with committing an indignity to a dead body.
An autopsy is being conducted to determine the cause of Miller's death. Police said in a statement that more charges are possible.
Reynolds is accused of committing the offence between July 9 and 13.
He will remain in custody until his next court appearance on Aug. 4.
Today's court appearance only lasted a few minutes and Reynolds stood in the prisoner's box the entire time, dressed in a long, white institution-issued shirt.
He did not talk during the appearance.
David Lutz, his lawyer, also offered no comment after the hearing concluded.
Miller's vehicle was discovered on Monday afternoon, according to police.
Her body was discovered at about 8 p.m. on Monday in a wooded area just off of Highway 1 near Prince of Wales, which is west of Saint John.
Her body was discovered on a dirt road that runs parallel to Highway 1, about 300 metres to the north of the highway.
Two RCMP vehicles are blocking the road about 500 metres away from where Miller's body was discovered.
A Mountie command vehicle and six other vehicles can be seen near where the body was discovered. At least eight uniformed officers were searching the underbrush on Tuesday morning and an RCMP dog handler was on the scene.
An officer said they are searching for evidence and making sure nothing was missed in earlier searches.
Miller, of Apohaqui, N.B., was reported missing on Sunday.
The RCMP's major crimes unit and two other RCMP detachments are investigating.
Leroy Armstrong, a former MLA in the area, said people in Apohaqui are just learning of Miller's death.
"This is a very quiet village and you don't expect anything of this nature to happen," he said.