A Prince George's County Police academy recruit class walks through a ravine near Chartsey Street in Kettering to search for evidence in the Aug. 22 fatal shooting of 17-yaer-old Amber Stanley. (Daniel J. Gross | The Gazette)

It’s been more than seven days since 17-year-old Amber Stanley, a senior at Charles Flowers High School in Springdale, was fatally shot inside her Kettering home, and police in Prince George’s County are widening their search after discovering that the killer walked quietly away from the scene on foot.

After the shooting, the killer walked, rather than ran, to the east from the home on Chartsey Street, said Capt. Joe Hoffman of the county police department’s homicide unit.

The shooting took place about 10:23 p.m. Aug. 22 in the 100 block of Chartsey Street, when a gunman kicked in the front door of Stanley’s home, went directly to her bedroom and shot her multiple times before leaving, police have said. Three other occupants were in the home at the time but no one else was harmed, police said.

“We’ve been aggressively working this case since 10:23 hours last [Wednesday] and we’ve brought all of our resources into this and running down every lead,” said Hoffman, while working with detectives in the neighborhood Friday.

On Friday, homicide detectives and 13 recruits from police academy class 121 examined streams, manholes, foliage and other areas of interest throughout the quiet neighborhood of single-family in hopes of finding clues that might lead them to the suspected killer.

Hoffman would not say if any evidence had been found as of Friday morning.

He said police think the killer walked to Chartsey Street and Cambleton Drive after shooting Stanley and went east along Cambleton. He said they’ve been working with “very cooperative neighbors” and that “it’s a wonderful community and just adds to the tragedy.”

Stanley was an honors student at Charles Flowers. She was enrolled in the school’s science and technology magnet program and had her eyes set on attending Harvard University with aspirations of becoming a doctor, said school Principal Gorman Brown.

Bill Moore, 82, lives on Essenton Drive, which police say the shooter passed by when leaving the scene.

“I didn’t realize the perpetrator walked right through here until I spoke to police today,” Moore said. “Naturally, we don’t like that.”

He said that while he did not know Stanley, he was pleased with the efforts made by county police in searching for evidence, and using the academy recruit class to aid in the investigation.

He said other than an assault in early July, the neighborhood is generally peaceful and free of criminal activity.

Charles Smith, who lives a few houses down from Stanley on Chartsey Street, said he is confident that the police investigation will yield results.

There was no answer at Stanley’s residence Friday.

Hoffman said police are investigating all persons known to Stanley, including those living at the home.

“On a murder investigation, you’re going to look at every person in the home and whoever the victim was associated with,” Hoffman said.

Police are asking anyone with information to call PGPD’s homicide unit at 301-772-4925 or Crime Solvers at 866-411-TIPS to remain anonymous and be offered a reward of up to $25,000 for tips leading to the arrest and indictment of the suspect.

“We want every phone call, no matter what the information, and we’ll put it all together,” Hoffman said.