By Mike DeNardo, Oren Liebermann

PHILADELPHIA (CBS) — It was a solemn procession on Sunday afternoon, as slain Officer Moses Walker’s casket was carried on a horse-drawn caisson to the North Philadelphia church where his viewing was to be held.

People lined Lehigh Avenue in somber silence, watching as the horse-drawn caisson made its way by. At the head of the column, Mayor Michael Nutter and Commissioner Charles Ramsey.

Ramsey called it a painful day for the police family.

“You come to see how people grieve. You see the loss. You see the void that’s left behind,” Ramsey said. “And we’re not immune from that. And it’s times like this that it comes to the surface.”

Police commanders and Walker’s colleagues from the 22nd District followed in the procession to the Deliverance Evangelistic Church for his viewing.

People from the community were also there to pay their respects and to show their support to a department in mourning again.

The officer is already home,” said Eddie Ives. “So this is just like the formalities, I guess you would call it. But it’s great, a great outpouring from the community and, of course, the police department.

I’m just so proud of Philadelphia, how they turned out,” said Dorothy Jackson, a family friend. “It makes you cry almost.”

Another viewing was to be held on Monday from 7:00 a.m. to 9:00 a.m.