Back for two days from his Martha's Vineyard vacation, President Obama said he would send Attorney General Eric Holder to Ferguson, Missouri on Wednesday,  as he again urged police and protestors to avoid further conflict in the wake of the killing by an officer of an unarmed black teenager.

"While I understand the passions and the anger that arise over the death of Michael Brown, giving into that anger by looting or carrying guns, and even attacking the police only serves to raise tensions and stir chaos," the President told reporters in the White House Briefing Room, saying such violence "undermines" justice.

Here's more of what the President said about the troubles in Ferguson, Missouri:

I also want to address the situation in Ferguson, Missouri. Earlier this afternoon, I spoke with Governor Nixon, as well as Senators Roy Blunt and Claire McCaskill.  I also met with Attorney General Eric Holder.  The Justice Department has opened an independent federal civil rights investigation into the death of Michael Brown.  They are on the ground and, along with the FBI, they are devoting substantial resources to that investigation.  The Attorney General himself will be traveling to Ferguson on Wednesday to meet with the FBI agents and DOJ personnel conducting the federal criminal investigation, and he will receive an update from them on their progress.  He will also be meeting with other leaders in the community whose support is so critical to bringing about peace and calm in Ferguson.

Ronald Davis, the Director of the DOJ’s Office of Community-Oriented Policing Services -- or COPS -- is also traveling to Ferguson tomorrow to work with police officials on the ground.  We've also had experts from the DOJ’s Community Relations Service working in Ferguson since the days after the shooting to foster conversations among local stakeholders and reduce tensions among the community.  

So let me close just saying a few words about the tensions there.  We have all seen images of protestors and law enforcement in the streets.  It's clear that the vast majority of people are peacefully protesting.  What’s also clear is that a small minority of individuals are not.  While I understand the passions and the anger that arise over the death of Michael Brown, giving into that anger by looting or carrying guns, and even attacking the police only serves to raise tensions and stir chaos.  It undermines rather than advancing justice.

Let me also be clear that our constitutional rights to speak freely, to assemble, and to report in the press must be vigilantly safeguarded, especially in moments like these.  There’s no excuse for excessive force by police or any action that denies people the right to protest peacefully.  Ours is a nation of laws for the citizens who live under them and for the citizens who enforce them.  

So to a community in Ferguson that is rightly hurting and looking for answers, let me call once again for us to seek some understanding rather than simply holler at each other.  Let’s seek to heal rather than to wound each other.  As Americans, we've got to use this moment to seek out our shared humanity that's been laid bare by this moment -- the potential of a young man and the sorrows of parents, the frustrations of a community, the ideals that we hold as one united American family.  

I’ve said this before -- in too many communities around the country, a gulf of mistrust exists between local residents and law enforcement.  In too many communities, too many young men of color are left behind and seen only as objects of fear.  Through initiatives like My Brother’s Keeper, I'm personally committed to changing both perception and reality.  And already we're making some significant progress as people of goodwill of all races are ready to chip in.  But that requires that we build and not tear down.  And that requires we listen and not just shout.  That's how we're going to move forward together, by trying to unite each other and understand each other, and not simply divide ourselves from one another.  We're going to have to hold tight to those values in the days ahead.  That's how we bring about justice, and that's how we bring about peace.

So with that, I've got a few questions I'm going to take.  I'm going to start with Jim Kuhnhenn of AP.              

     Q    Right here, Mr. President.  The incident in Ferguson has led to a discussion about whether it's proper to militarize the nation’s city police forces, and I'm wondering whether you wonder or do you think that -- you see that as a factor regarding the police response in Ferguson.  And also, do you agree with the decision by the Governor to send in the National Guard?

     THE PRESIDENT:  Well, I think one of the great things about the United States has been our ability to maintain a distinction between our military and domestic law enforcement.  That helps preserve our civil liberties.  That helps ensure that the military is accountable to civilian direction.  And that has to be preserved.

     After 9/11, I think understandably, a lot of folks saw local communities that were ill-equipped for a potential catastrophic terrorist attack, and I think people in Congress, people of goodwill decided we've got to make sure that they get proper equipment to deal with threats that historically wouldn't arise in local communities.  And some of that has been useful.  I mean, some law enforcement didn’t have radios that they could operate effectively in the midst of a disaster.  Some communities needed to be prepared if, in fact, there was a chemical attack and they didn’t have HAZMAT suits.

     Having said that, I think it's probably useful for us to review how the funding has gone, how local law enforcement has used grant dollars, to make sure that what they’re purchasing is stuff that they actually need, because there is a big difference between our military and our local law enforcement and we don't want those lines blurred.  That would be contrary to our traditions.  And I think that there will be some bipartisan interest in reexamining some of those programs.

With respect to the National Guard, I think it's important just to remember this was a state activated National Guard and so it's under the charge of the Governor.  This is not something that we initiated at the federal level.  I spoke to Jay Nixon about this, expressed an interest in making sure that if, in fact, a National Guard is used it is used in a limited and appropriate way.  He described the support role that they’re going to be providing to local law enforcement, and I'll be watching over the next several days to assess whether, in fact, it's helping rather than hindering progress in Ferguson.