BIG BEAR LAKE, California (Reuters) - Heavy snow hampered the second day of a mountaintop manhunt on Friday for a fugitive former policeman wanted as a suspect in three California murders and accused of declaring war on police in an Internet manifesto that railed against his 2008 firing. As investigators sought clues to whether Christopher Dorner was holed up in the rugged San Bernardino mountains east of Los Angeles or had slipped away undetected, police across the region continued to chase down unconfirmed sightings and dead-end leads. ...