The space.com article stated "Dark matter cannot be seen directly. We know it exists because we can see the gravitational effects it has on surrounding matter. There are different theories about what dark matter may actually be. The standard model suggests it is cold, meaning it moves very slowly and only interacts with other matter through the force of gravity. This would be consistent with it being made up of particles known as axions or WIMPS. Another theory, however, suggests it is warm, meaning it moves at higher speeds. One such particle candidate is the sterile neutrino."
There are plenty of reports published for DM candidate particle searches. Null record answers are abundant in the SQL query
Perhaps if DM particle searches keep turning up missing. may be it is time to rethink the DM paradigm.