a major court ruling impacts the way police catch criminals. tonight, the growing public safety concerns in this d.n.a. debate. could be some major fallout here. good evening and thanks for joining us. i m adam may. that major court decision could change the way evidence is collected. it s a ruling that is sparking outrage among police across maryland. w.j.z. is live tonight. ouija jang has more on the impact. reporter: it was back in 2008 the governor pushed to pass a law that gave police the right to collect d.n.a. when they arrested people for violent crimes but the state s highest court says that is a violation of rights. police departments across maryland are reeling, claiming a critical tool for solving crimes has been taken away. our concern about the court s ruling is that it is going to impede us from being able to put certain bad guys behind bars, that we have been able to put behind bars as a result of this d.n.a. evidence. this week the state s highest cou