The chance of a cop being killed on the job last year, once you subtract traffic accidents, was roughly the same as working construction.

The number of law enforcement officers killed in the line of duty dropped sharply in 2017, marking the second-lowest toll in more than 50 years.
As of Thursday, 128 officers have died in the line of duty this year, with 44 shot and killed. That's down 10% from 2016, when 143 officers died, with 66 gunned down, according to data released by the National Law Enforcement Officers Memorial Fund, a nonprofit aimed at honoring officers and improving safety.
The only other year with fewer deaths in the past five decades was 2013, when 116 officers were killed.

As you can see, this is part of a long-term trend.

So cops are safer than ever before.
You and me, OTOH, are in as much danger from cops as we ever were.

For the third year in a row, police nationwide shot and killed nearly 1,000 people, a grim annual tally that has persisted despite widespread public scrutiny of officers’ use of fatal force.
Police fatally shot 987 people last year, or two dozen more than they killed in 2016, according to an ongoing Washington Post database project that tracks the fatal shootings. Since 2015, The Post has logged the details of 2,945 shooting deaths, culled from local news coverage, public records and social-media reports.