By TERRY SPENCER and FREIDA FRISARO FORT LAUDERDALE, Fla. (AP) — A former Marine sharpshooter accused of invading the home of apparent strangers in Florida and fatally shooting a woman, her 3-month-old baby and two others was ordered held without bail during his first court appearance Monday. Authorities did not give a motive for the grisly attack, but they said Bryan Riley may have a mental illness