Jorge Alcantara-Gonzalez is charged with murder and first-degree robbery in the disappearance of Ian Eckles, who vanished during a hunting trip in 2020. CLE ELUM, Wash. — A GPS watch, fragments of window stickers and a trail of blood evidence helped investigators build the murder case against the man charged with killing a Kent man who vanished during a hunting trip more than six years ago, according to newly filed court documents. Jorge Oma Alcantara-Gonzalez, 40, was charged this week in Kittitas County Superior Court with murder and first-degree robbery in connection with the disappearance and presumed death of Ian…