Right now we're in a transitional phase where DNA data is integrated with traditional police work, where there may be a priori reasons to suspect someone before invoking DNA data to strengthen the case. Even this raises serious questions about privacy (the BTK killer even moreso than this case: they found him using his daughter's pap smear).
What is more worrying is the incentive to go straight to DNA in the future, entangling lots of innocent people in DNA dragnets because of the birthday problem at scale.
