UPDATE 2: Stepfather Charged in 12-Year-Old's Death

UPDATE, Oct. 19 9:30 a.m.:

The 42-year-old Gaithersburg man charged in the murder of his 12-year-old stepdaughter has for the last four years been a Montgomery County bus driver.

David Rich Hang began driving for RideOn in January 2007, said county spokesman Patrick Lacefield. Hang was arrested on Tuesday, and is wearing a RideOn uniform in his police mug shot.

UPDATE, Oct. 18 6:32 p.m.:

The stepfather of 12-year-old Jessica Nguyen has been arrested and charged with first-degree murder in connection with the girl's May 31 slaying, Montgomery County Police said Tuesday evening.

David Rich Hang, 42, of the 17100 block of Queen Victoria Court in Gaithersburg, was arrested on Tuesday, according to police. A news conference is set for 11 a.m. Wednesday. 

A police spokesman did not initially confirm that it was Hang who had been arrested, but police named him in a statement issued at 6 p.m.

Online court records show that Hang and Jessica Nguyen's mother began divorce proceedings in October 2010.

Original story, Oct. 18 6:10 p.m.:

Montgomery County Police have made an arrest in the slaying of Jessica Nguyen, the 12-year-old found stabbed to death in the basement of her Gaithersburg home nearly five months ago.

Detectives arrested a suspect on Tuesday, according to a police source who requested anonymity.

A county police spokesman was not immediately able to confirm the arrest.

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.