INDIAN RIVER COUNTY — A 33-year-old man traveled on a Greyhound bus from Arizona down to Orlando, where he took an Uber to his ex-girlfriend’s residence near Vero Beach and shot her in the street, Sheriff Eric Flowers said Thursday. Flowers said the man, identified as Matthew Allen Waggle, shot the woman in “cold blood” in front of her home in a mobile home lot. Matthew Waggle PHOTO PROVIDED BY INDIAN RIVER COUNTY SHERIFF’S OFFICE Flowers said W…