The suspect in a shootout that killed one Edmonton police officer and injured another was the focus of a lengthy hate crime investigation dating back to February 2014.

Edmonton Police officers were at a home near 186 Street and 62A Avenue on Monday to serve an arrest warrant for criminal harassment to Norman Walter Raddatz.

Raddatz, 42, was known to police, but did not have an extensive criminal record, Knect said.

The arrest warrant was related to 鈥渙nline bullying and hatred of an Edmonton family (that) had become extreme,鈥� he said. "The family members were increasingly worried about their personal safety at which time the Edmonton Police Service became involved."

Knecht said the remains of a body were found in the basement of the home, which later burned down, and that an autopsy will be done to confirm the identity.

Neighbours told CTV Edmonton the owner of the home where the shooting occurred was a divorced man in his 40s. They said he had children but lived alone, and occasionally ran into "problems" with the city over mowing his lawn, shovelling his sidewalk and parking an RV on the street.

The man was also known to have weapons, and once went to a shooting range with a neighbour.

Police said Tuesday morning they are not looking for any other suspects.

Investigators found 53 bullet holes in a residence located across the street from the home, indicating the magnitude of the shootout.

Neighbour Ollie Noble said bullets passed through her garage, a computer room and a hallway before landing in her family room.

Const. Daniel Woodall was shot as officers attempted to execute the warrant. The 35-year-old father died at the scene. Sgt. Jason Harley was shot in the lower back and was taken to hospital. He has since been released and is expected to recover.

Both officers were wearing bulletproof armour at the time.

'Pinned down by gunfire'

Knecht said officers knew the suspect was inside as they approached the home, but they didn't know if anyone else was with him.

He said the incident was very "fluid" and fast-moving.

According to results of the preliminary investigation, there was "no believed threat" as officers approached the residence. Harley was the first officer at the door, Knecht said.

The chief said investigators believe a large bore rifle was used by the suspect during the attack.

As the suspect opened fire, the officers took cover, with the bulk of them being "pinned down by gunfire" for at least 10 minutes, Knecht said.

"Based on our current information, EPS did not return fire," he said.

"Because they could not tell where the shots were coming from, their safest course of action was to remain static. Those members were in harm's way and survived," Knecht told reporters.

"As we recognize the accomplishments of Const. Woodall, we will also remember Sgt. Harley and these other police officers came very, very close to death."

Condolences for family, friends

Condolences poured in for the slain officer and his family on Tuesday.

Knecht said Woodall was being remembered as 鈥渁 keen investigator, a dedicated father and husband, and a passionate soccer supporter.鈥�

鈥淗is wife told me this morning that he died doing what he loved,鈥� Knecht added.

Police agencies across North America, including the Ontario Provincial Police, the RCMP, and the FBI all sent words of sympathy and solidarity, he said.

Prime Minister Stephen Harper issued a statement Tuesday morning expressing his condolences.

"On behalf of all Canadians, Laureen and I offer our deepest condolences to his family, friends and colleagues. We also pray for the full and speedy recovery of Sergeant Jason Harley who was shot in the same incident," he said in the statement.

Edmonton Mayor Don Iveson said the city is safe thanks, in large part, to courageous first responders like Woodall and Harley.

"We rely on our police to protect us from the few and the worst among us, and Const. Woodall's respected work in the Hate Crimes Unit reflects our highest aspirations for a safe and caring community," he said. "His vital contributions to our city shall not be forgotten."

Alberta Premier Rachel Notley said in a statement that she was left "heartbroken" after learning of Woodall's death.

"This tragic event is a somber reminder of the dangers our men and women in uniform face every day in their service to Albertans," she said.

Woodall, 35, was married and had children. He had recently moved to the EPS Hate Crimes Unit after immigrating to Canada from the U.K. eight years ago.

On Tuesday morning, his wife, Claire, tweeted a flurry of hashtags including #ForeverInMyHeart and #husband.

It's been 25 years since the last time an Edmonton police officer was killed on duty. Const. Ezio Farone was fatally shot in a failed bank robbery in June of 1990.

With files from CTV Edmonton