'systematic killing' is a perfectly correct and usable phrase in written English.
You could use it to refer to an intentional, organized, and often methodical form of killing, such as genocide or mass killing. For example: "The dictator's regime was responsible for the systematic killing of nearly one million people".
Running alongside the Humane Society of America's National Animal Shelter Appreciation Week of Nov. 7 to 13, The No-Kill Advocacy Center -- a group which works to stop the systematic killing of animals inside our country's shelter system -- has launched the special week to focus attention on what's really going on inside our country's animal shelter system.
The systematic killing of patients referred to as 'useless eaters' in Germany during the Nazi era has, since the Nuremberg Trials, associated euthanasia with killing patients for financial or ideological reasons.
Does he propose no Israeli pressure in response to a systematic killing of Jews?
And there was the emergence of systematic killing camps in Poland in 1942.
"I've heard from scores of people who were in Omarska that there was widespread and systematic killing..
That native people's systematic killing was a necessary means to an end of the state's development and current prosperity.
With peace talks due to begin this week in Switzerland, a report lays out new evidence that the Syrian government engaged in the "systematic torture and killing" of detainees that it says could support charges of war crimes and crimes against humanity.
"To prove systematic killings and prove systematic hiding of bodies.
Evidence is mounting that Rwandan forces, which were ordered by Kagame into Congo in pursuit of Hutu militias, may have taken systematic revenge on refugees, killing tens of thousands of civilians who had taken refuge in camps and villages across the border.
More than 70 Lynwood residents filed a civil rights lawsuit last September alleging that deputies engaged "in systematic acts of shooting, killing, brutality, terrorism, house-trashing and other acts of lawlessness and wanton abuse of power," especially against Latinos and blacks.
A former commander in the Khmer Rouge — a murderous regime thay killed nearly a quarter of the country's population in the 1970s — his security forces have imprisoned critics, executed political opponents and embarked on systematic campaigns of torture, killing and land confiscation.
