EXCLUSIVE: One-on-one interview with Boston Police Comm.

BOSTON (WITI) -- Following the tragedy in Boston after explosions near the finish line of the Boston Marathon, every police officer in Boston is turning 12-hour shifts right now, as controlling the crime scene is a massive job -- the most complex the city has ever seen. Boylston Street in Boston is now a federal crime scene.

FOX6's Brad Hicks spotted Boston Police Commissioner Ed Davis, a block away from the first blast site standing outside of Starbucks.

"We're making a lot of progress, and we're processing every piece of evidence," Davis said.

When asked whether anyone has been arrested in the case, Davis said: "It's impossible for me to comment on the investigation. It's very active."

Davis wasn't at Starbucks for coffee -- but instead, to comfort people.

"We need to continue the investigation and make people feel safe. Don't be afraid. We'll be alright," Davis said.

One woman FOX6's Brad Hicks spotted walking her dog in a nearby park said she hasn't been on usually busy Bolyston Street since the incident.

"I just don't feel safe up there," the woman said.

Davis says the sense of security in Boston will creep back, as it always does.

"(The bombings) won't be forgotten. There will be no closure on this," Davis said.

The crime scene is seven blocks long, and each intersection is barricaded and blocked by police -- which is a hassle for those who live and work in the restricted area.