Tucson police say speed may have been a factor in a deadly pedestrian crash authorities say 17 year-old Joanna Sandino was crossing Silver Lake Road west of Cottonwood Lane yesterday when she was hit by a Chevy Cruze police say cindino ran across the road after a large truck passed in front of her the driver of the Chevy saw her but was unable to stop in time the area does not have a crosswalk the National Guard assisted Yuma Border Patrol agents in the arrest of two criminal migrants Customs and Border Protection say the National Guard personnel