Possible Sniper? Growing Fears Along Stretch of American Highways

Task force investigating four cars that were shot at during a 48-hour period.
1:24 | 09/02/15

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Transcript for Possible Sniper? Growing Fears Along Stretch of American Highways
Next tonight here, the possible highway sniper on the loose in Phoenix. Four shootings now in 48 hours as we mentioned along this same stretch of interstate ten. A young girl hurt in one incident. ABC's Clayton Sandell on the warning for drivers. Reporter: Four random freeway shootings and tonight one question, who is doing it. Along interstate 10 in Phoenix Saturday morning, a bullet shatters the windshield of this SUV, a 13-year-old girl inside cut by flying glass. Minutes later a shot rips into this tour bus, putting holes through the seats. But luckily, driver Robert McDonald was the only one on board. The person almost took me away from my family and almost caused catastrophic injuries to the other motorists on the street. Reporter: Two more cars were hit, one Saturday night, another early Monday. All four shootings within this 8-mile stretch. Just random vehicles traveling on interstate 10. Reporter: Detectives in two other states are also trying to solve mystery highway sniper cases. Near battle creek, Michigan, at least six cars have been damaged and in northern Colorado -- Somebody just hit me and I'm bleeding from my neck and I'm scared. Reporter: Several shootings since spring, some of them linked. David, a task force is now investigating the cases here in Colorado, but like the highway shootings in Michigan and Arizona, there are no suspects, no arrests. David? Clayton, thank you. When we come back here, how

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