Two brothers suspected along with their cousin of killing a 78-year-old woman during a botched robbery at her Vermont home in 2010 and then dumping her body in a ravine have pleaded not guilty to murder and other charges.

Half-brothers Richard Fletcher and Keith Baird entered the pleas in court Monday while relatives of victim Pat O'Hagan looked on.

O'Hagan was a grandmother of nine from Sheffield. Police say she was shot in the head and her body was sexually assaulted before being dumped 10 miles away.

An arrest warrant was issued Friday for Fletcher and Baird's cousin Michael Norrie, who's in prison in Pennsylvania on unrelated charges and can't be reached for comment. Norrie told police the men went to O'Hagan's home after Fletcher said "she had pills."

O'Hagan's sons say the charges are a step toward justice.