A judge ruled Thursday that the man accused of killing Jane McQuain in Germantown will be held without bond.
Citing Curtis Lopez's "horrendous" criminal history, Judge Barry Hamilton ruled that the suspect will not be released from jail.
Lopez is accused of killing McQuain in mid-October at the condominium she shared with her young son, 11-year-old William McQuain.
William McQuain was later found dead in the woods in Clarksburg. Authorities plan to charge Lopez in connection with William's murder.
Lopez, who was taken into custody in North Carolina but extradited to Maryland Wednesday, appeared in court via a closed-circuit system.
During the hearing, a prosecutor told the judge that Lopez came to Maryland to steal Jane McQuain's vehicle so he could bring it to his girlfriend in North Carolina. Lopez allegedly texted pictures of the vehicle to his girlfriend.
The prosecutor said Jane McQuain was killed with a 30-pound weight that was found in his son's room. Lopez is also accused of stabbing her. Prosecutors indicated the 51-year-old mother was killed while she slept in her in bed, while her son was killed the following day.
Authorities allege Lopez killed the child with a baseball bat.
Surveillance video from a Clarksburg gas station shows Lopez leading William McQuain into the woods, authorities said.
A memorial remains on the front porch of the McQuain's apartment building a month after their deaths.
Prosecutors have not determined yet if Lopez will face the death penalty. He was previously convicted of stabbing a man multiple times in the late 1980s.