we are coming out of another deadly weekend in america. according to the gun violence archive, at least 150 people were killed, and over 380 injured in shootings across the country. so in tucson this one shooting rampage took place at three different crime scenes, left two people dead, an emt in critical condition. cnn security correspond josh campbell is following that story for us. what happened, josh? reporter: a truly brazen and deadly act of violence jechl in tucson, arizona. a 35-year-old murder suspect is in custody and in critical condition after a shootout with police. authorities believe the suspect set a fire at a residence and then went to a nearby park where he flagged down two emts, he began pointing in the direction of the fire, and without warning, brandished a firearm and shot at the medics, hitting one of them in the head, shooting another in the arm and the chest.