MONTEREY (BCN/CBS SF) — A 54-year-old man has been sentenced to 15 years in prison for shooting projectiles with a slingshot onto highways in Monterey County more than 50 times in 2019 and 2020, prosecutors said Tuesday.

Charles Lafferty had pleaded guilty to 28 counts of assault with a deadly weapon and two counts of assault with a deadly weapon on a peace officer for a series of incidents between February 2019 and January 2020, according to the Monterey County District Attorney’s Office.

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The California Highway Patrol was investigating the cases, many reported in the area of U.S. Highway 101 and state Highway 156, and used what the District Attorney’s Office described as a “detailed digital forensic analysis” to link Lafferty to more than 50 incidents.

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Among the cases, six people reported cuts and scrapes from broken glass but most were uninjured and no crashes resulted from a vehicle being hit by a projectile.

Lafferty was arrested Jan. 22, 2020, in Nipomo in San Luis Obispo County and he admitted to shooting marbles at traffic with a slingshot, but did not give a motive for why he shot them. Investigators seized a slingshot and dozens of marbles from his vehicle when he was arrested, prosecutors said.

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