The phrase "senseless killings" refers to the act of taking someone's life without any purpose, reason, or rational explanation. It describes violent acts that do not seem to have a logical motive or make any sense to most people. Full definition
In the wake of the unforgivable and senseless killings in Las Vegas on Sunday night, the deep and widespread fear of gun violence will, no doubt, grow even deeper and more widespread. (fortune.com)
Everytime I hear stories about senseless killings I am reminded of this horrendous incident of my life. (religion.blogs.cnn.com)
If we want to do something constructive to reduce new senseless killings and suffering in the future - act to control guns, better identify and treat mental illness, etc.. (religion.blogs.cnn.com)