A man allegedly killed his entire family 23 years ago in Arizona, and then disappeared into thin air, police said. He then spent decades on the FBI’s Ten Most Wanted Fugitives list. Robert William Fisher is accused of murdering his family and then blowing up the house they lived in, according to the FBI. Robert Fisher’s wife, Mary Fisher, and their two children were found with their throats slashed inside their burnt-down house, ATI reported. Robert Fisher was missing from the scene. Authorities uncovered several clues but could not tell what exactly happened to him. On April 9, 2001, at 10.43…