A Potomac teenager who is accused of robbing and killing a Gaithersburg man has been indicted on six charges, including murder and robbery with a dangerous and deadly weapon.

Artie Ellis, 15, of the 7700 block of Scotland Drive, is being held without bail at the Montgomery County Correctional Facility in Clarksburg. He is accused along with his girlfriend, Emily Drew Geller, 18, of the 8300 block of Larkmeade Terrace, of robbing and killing Gaithersburg resident Ali Reza Zare, 57.

The indictment included charges of conspiracy to commit murder, conspiracy to commit robbery with a dangerous and deadly weapon, felony theft and conspiracy to commit felony theft, according to Montgomery County State's Attorney's Office spokeswoman Emily White.

Geller is also being held without bail at the Clarksburg facility. She is slated for a preliminary hearing Nov. 13. Both are charged as adults.

The two teenagers lured Zare into a secluded area, struck him on the head with a shovel, robbed him and left him to die on a walking path, Gerald Collins, an assistant state's attorney, said at Geller's bail review hearing Oct. 15. At Ellis' bail review hearing Oct. 20, Collins alleged that Ellis was a gang member.

Ellis' attorney, Patrick Smith, said Ellis struggled with anger management problems and attention deficit disorder and had a history of mental health-related hospitalizations.

At Geller's hearing, Collins said that Geller was acquainted with Zare, though police have not said how they knew each other. On May 9, several phone calls were placed between Zare's cell phone and the land line at the Potomac home where Geller lived with her parents, Donald and Madelaine, a half-mile from where Zare's body would be found the following day, according to court documents.

Court documents state that two witnesses told police that Geller told them Ellis had struck Zare in the head with the shovel and left.

On Oct. 14, a search warrant was executed at Geller's home, where the shovel was uncovered, White said. Geller described the shovel to police in a statement before the search, White said. The shovel is suspected to be the murder weapon, though further tests are needed, Collins said Oct. 15.

Court documents allege the two stole Zare's Verizon BlackBerry Storm cell phone, a Macy's Visa credit card, a Maryland driver's license, cash and a blue Subaru. The Subaru belonged to Zare's son, though he had been driving it at the time of Zare's death, court documents said.

Around 1:30 p.m. May 10, police discovered the Subaru abandoned near Seven Locks Elementary School. Geller's fingerprints were found on the vehicle.

That same afternoon, the Macy's credit card was used several times — by a man and a woman matching Geller's and Ellis' descriptions — in attempts to withdraw money from the Bank of America cash machine in Westfield Montgomery mall, court documents state. The unsuccessful attempts were caught on mall surveillance video.

A search warrant executed at Ellis' home in May uncovered Zare's cell phone in a backpack in Ellis' room, according to court documents.

Geller is also facing charges for stealing a car and eluding police stemming from an August incident. Family members of both Geller and Ellis have declined comment.