Gangs blamed in three of four Denver weekend shooting deaths

<p>(Photo: CPR/Megan Verlee)</p>
<p>Denver Police Chief Robert White talks to reporters Monday, March 16, 2015 about four shooting deaths in the city over the weekend.</p>
Photo: Denver Police Chief Robert White, news conference, 4 homicides
Denver Police Chief Robert White talks to reporters Monday, March 16, 2015 about four shooting deaths in the city over the weekend.

Denver Police Chief Robert White is urging anyone who knows anything about this weekend’s murders to call in a tip. "We’ve got to be much more aggressive in fighting some of the gang activity that we’re seeing, and that needs to happen collaboratively," he says, adding that people who could help the investigations are not working with police.