They're often called "ambush" killings. Recent slayings of lawmen -- a Colorado prison chief, a Texas prosecutor, a West Virginia sheriff and a California cop -- conjure up comparisons to the deadly surprises and have contributed to a disturbing increase this year in law officer killings nationwide, analysts say. "When somebody says 'ambush,' you see a character in a movie and you expect a guy to trip over a line or somebody pop up from a garbage can or somebody has the high ground and shoots on them," said Steve Weiss, research director for the Officer Down Memorial Page, whose website tracks slain U.S. law officers.
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Ambush killings against law officers have occurred in California, Colorado, Texas, West Virginia
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They contribute to an overall increase in slain officers so far this year, one group says
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Many police fear the bullet addressed "To Whom It May Concern"
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But respect toward law officers is much greater than it was in the 70s, expert says
"They type of incidents in @placeholder and with the Colorado prison director is even more unusual.