EULESS — A metal object found at a business parking lot last week has been identified as a 140-year-old artillery shell from the Civil War era, authorities said Friday.The live round was scheduled to be defused in a few days by the members of the Northeast Explosive Response Team, who retrieved the shell on Jan. 5 from property at Simtek Inc.Authorities believe the shell could still contain black powder.“It still had a fuse cap at the end of it,” said Euless fire investigator Vernon Gilmore.A military official identified the shell this week after being shown photographs of it.The shell was...