( CNN ) -- Investigators have no suspect in the stabbing death of an 8-year-old girl in her California home Saturday , a law enforcement official said Sunday . Leila Fowler 's brother found the child with `` severe injuries '' in the Calaveras County , California , home Saturday , and she was pronounced dead later at a hospital , according to Calaveras County Sheriff Capt . Jim Macedo . Her parents were `` nearby at a public event '' at the time , Macedo told reporters . The brother , who was not named , `` is not a suspect at this time , but we are continuing to talk to him , which would be normal because he was the last person with the child , '' he said . Detectives are tracking down dozens of leads phoned into a tip line created Saturday , including some leading to other counties , he said . A search of the family 's home overnight Saturday gave investigators a `` substantial amount of evidence , '' he said . He would not describe how the girl was killed . Witnesses have given police three differing descriptions of a possible intruder into the home , he said . The Sheriff 's Office is not releasing any of those descriptions , Macedo said . `` We do n't want to lead anybody in the wrong direction , '' he said . A widespread search is being conducted for clues , he said . Deputies will have an `` increased and visible presence at the schools and bus stops '' until the crime is solved , he said .
Leila Fowler 's mother found the girl with ` ` severe concussion '' in her bedroom Saturday . Her parents were ` ` nearby at a public event '' at the time , official statement . Her brother ` ` is not a suspect at this time , '' a sheriff 's report says .