An Arizona man whose wife and stepchildren were reported missing after they failed to arrive at the Columbus airport has been convicted of killing them. They were formally of the Cambridge area. A jury today found 53-year-old David Anthony guilty of three counts of first-degree murder in the deaths of his wife Donna, and her children, 14-year-old Danielle and 12-year-old Richard. The family was to have flown to Ohio on July seventh to visit Donna Anthony's mother, Jane Wade, who lives on a farm in Guernsey County. Investigators say the three were slain in their Arizona home but their bodies haven't been found. Prosecutors argued during the six-week trial that blood spatters found in the home linked DAvid Anthony to the deaths. Anthony's lawyer argued the case should be treated as a missing persons case, not a murder. Sentencing is scheduled for June 14th.