(CNN) -- Detectives on Saturday arrested the 12-year-old brother of Leila Fowler on "charges of homicide" in connection with the 8-year-old girl's death, Calaveras County, California, Sheriff Gary Kuntz said.
Leila Fowler and her brother were alone on Saturday, April 27, in their family's Valley Springs, California, home when she was found dead. The 12-year-old told police that he'd seen an intruder leaving the home, then found his sister suffering from stab wounds.
She died minutes after arriving at a hospital, authorities said.
After the incident, police offered a sketchy description of the suspect as a 6-foot-tall white or Hispanic male with a muscular build.
They've also ran down leads as well as searched in attics, storage sheds and more in the rural, mountainous community located about 60 miles southeast of Sacramento.
Authorities also combed the Fowler's home and neighborhood looking for evidence.
"We did collect fingerprints during that search," Calaveras County Sheriff's Capt. Jim Macedo said days after the attack, "and we did collect what we believe to be DNA."
The stabbing shook the small town of Valley Springs, where purple ribbons, Leila's favorite color, were tied to stop signs.
"We are devastated," the girl's mother, Crystal Walters, told CNN via her Facebook page. "She didn't deserve this. ... She was so full of life."