County Police chief Thomas Manger today revealed more details about the four-month investigation that led to the arrest of a Gaithersburg man for the murder of his 12-year-old stepdaughter in May.
On Tuesday, police arrested David Rich Hang, 42, of the 17100 block of Queen Victoria Court in Gaithersburg and charged him with first-degree murder for the slaying of Jessica Nguyen on May 31.
DNA evidence found on the sheath of a small sword or knife left at the scene linked Hang to the scene, police said.
Manger said police believe the knife or sword from the sheath was the murder weapon, but they haven't located it.
Hang, a Ride-On bus driver, has been working regularly since the time of the murder, police said.
But on the afternoon of the slaying, he called off work, police said.
Family members found Nguyen in their home on Raven Avenue the evening of May 31. She had multiple stab wounds to her upper body.
Nguyen was a sixth-grader at Gaithersburg Middle School, where she was an honor-roll student. Her family moved out of the home in the Hidden Creek neighborhood a week after her death.
Investigators are still working to figure out a motive, Manger said.
Hang and Nguyen's mother had been going through a difficult divorce for the year leading up to the murder, court records indicate.
"The parents were going through a pretty difficult divorce," Manger said. "There was a lot of bad blood."
Asked why Hang allegedly targeted his stepdaughter, he was at a loss.
"There are questions we continue to ask, and have no answer to at this point,"
Police also believe Hang had at least one other wife, and possibly more, in what Manger said could have been an immigration scam.
"There are some appearances that may have been the case," he said.
Hang had lived at the home on Raven Avenue where Nguyen was murdered, but was not living there in May. Police said there were no signs of forced entry.
Hang will have a bond review hearing today at 1pm. Stay tuned to Patch for more updates.