"Citizens of Calaveras County can sleep a little better tonight," Kuntz said.
Leila Fowler and her brother were said to be alone on Saturday, April 27, in their family's northern 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.
The 8-year-old 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 also interviewed registered sex offenders in the area, ran down leads and 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."