Search underway for Leila Fowler's killer

A desperate search is underway for the person who stabbed an 8-year-old girl to death near Sacramento, Calif.

Police say Leila Fowler and her 12-year-old brother were home alone Saturday afternoon when he saw an intruder leaving the house.

The boy called his parents, who called 911.

He then found his sister, stabbed, severely wounded.

She later died.

Since then, police have been running down leads. But have no specific suspect.

They are looking for a white or Hispanic male, about 6-foot tall with a muscular build, wearing jeans and dark shirt.

He is considered armed and dangerous.