A Memorial Day picnic at South Shore Park in Milwaukee turned deadly in 2006 when an uninvited man, Octaviano Juarez-Corro, confronted his estranged wife and opened fire. Raymundo Munoz-Silva, 31, identified as Hispanic and the girlfriend’s boyfriend, was shot in the head and killed. A 17-year-old, Julio Diaz-Guillen, was also fatally shot in the head. Three other people were wounded, including the estranged wife, who survived two gunshot wounds to the chest. The gunman fled the scene in a vehicle, prompting a lengthy manhunt.

Juarez-Corro was later charged with two counts of first-degree intentional homicide and three counts of attempted first-degree intentional homicide. He remained at large for nearly sixteen years before being captured in Mexico and returned to Milwaukee to face those charges. He was later found unresponsive in his jail cell and pronounced dead; a ligature mark was noted on his neck and an investigation into the circumstances followed.

Did anyone attending the picnic or nearby that day notice a vehicle or person behaving suspiciously before the shooting?