Authorities say they have arrested the brother of an 8-year-old girl who was mysteriously stabbed at her home in a quiet Northern California community last month.

Calaveras County Sheriff Gary Kuntz told reporters at a news conference that the arrest was made late Saturday afternoon. He says the 12-year-old boy will be charged with homicide.

The boy had told police last month that he encountered an intruder in the home on the day Leila Fowler was killed. He described the man as being tall with long gray hair.

The April 27 attack shook the tightknit Valley Springs community of about 7,400 people and set off a massive manhunt. Investigators did a door-to-door sweep of houses, storage sheds and horse stables.