Authorities say three children taken by a jealous ex-husband who shot three former in-laws to death and strangled his infant daughter were found safe tonight. The G-B-I says the girls were found unharmed hours later in another northwest Georgia county. G-B-I spokesman John Bankhead says the suspect, Jerry William Jones, shot himself in the face after a police chase on Interstate 75 near the Tennessee line. Bankhead says Jones is expected to survive.   Jones allegedly abducted his two daughters and a former stepdaughter. An Amber Alert, was issued. That prompted a search across the Southeast.