Early this week, authorities plan to announce an arrest in the slaying of a Central High School junior who was fatally shot while walking to school, Prince George's County Assistant Police Chief Kevin Davis said.

Marckel Ross, 18, was gunned down in Capitol Heights on the morning of Sept. 11, 2012, while he was wearing his school uniform.

Davis' remark Friday about an imminent arrest in Ross' slaying was good news in a week that saw the slayings of several Prince George's youths.

Two more high school students were fatally shot last week, bringing the total number of Prince George's students killed this school year in the county to six. And young children were killed in incidents that appear to be accidental.

» On Monday afternoon, 15-year-old Suitland High School freshman Charles Walker Jr. was fatally shot in Hillcrest Heights when a group tried to rob of a pair of shoes he was carrying in a shopping bag, purchased for his girlfriend. Police announced Wednesday that five men had been arrested and charged with Walker's murder.

» On Tuesday, two 18-year-old men were fatally shot in a parking lot in Forestville. One of those victims, Aaron Kidd, was also a freshman at Suitland High School.

» On Wednesday evening, 3-year-old Dominic Watkins Jr. died after he was run over by the family car in Oxon Hill. The vehicle had been rolling backward at the time, and the boy's father had tried unsuccessfully to stop the car.

» On Thursday morning, a fire broke out at a family's home in Glenarden. The father and three of his young daughters were killed, and the mother and another daughter were injured. The fire was caused by an electrical problem.

"Nobody likes to see a young person get injured. Nobody likes to see a young person die," said Prince George's County police spokesman Cpl. Clinton Copeland. He added that community groups and county agencies need to work together in order to solve crimes and prevent future incidents.

There have been more homicides and fire deaths in Prince George's County this year than there had been at this time last year, officials said.

As of Friday afternoon, there had been 16 homicides in Prince George's County in 2013. There had been 12 slayings in the county at this time last year, and there were a total of 64 homicides in the county in 2012.

There have been eight fire-related deaths in Prince George's County so far this year, and there were a total of 10 fire deaths in the county in all of 2012.