TORONTO -- UPDATED: On Friday April 24, 2020, RCMP denied the report in The Globe and Mail, detailed below, that they had uncovered a hit list created by the killer.

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The shooter who killed 22 people in Nova Scotia began his attack by handcuffing and assaulting his girlfriend before she escaped and hid in the surrounding woods, CTV News has learned.

Gabriel Wortman's girlfriend, who has not been identified, was badly beaten, but survived the assault. She hid in the woods for hours but emerged in the early hours and told police that Wortman was driving a car made to look like an RCMP cruiser and wearing an authentic uniform.

He was able to evade police for more than 12 hours as his rampage began around his home in Portapique, N.S. and continued through central Nova Scotia.

The shooter's girlfriend provided officers with an image of the vehicle, which was shared on the Nova Scotia RCMP's Twitter page.

Officers had previously said it was a witness who informed them of the vehicle, but did not specify who it was.

After his girlfriend's escape on Saturday night, the 51-year-old denturist began burning homes and shooting neighbours near his property in Portapique, N.S., in an apparent attempt to strike names off a hit list, according to a report in The Globe and Mail.

By the time he was shot dead by police Sunday morning – 100 kilometres away in Enfield, N.S. – he had killed 22 people, including RCMP Const. Heidi Stevenson.

The Globe reported on Thursday that a man who lives near the shooter's property said he had been told by investigators that his name was "seventh or eighth" on a list that was found by police at the shooter's home.

There have been few clues so far into the shooter's apparent goals and motivations. Police have previously said that he knew some of his victims, but not all of them. He had an RCMP uniform in his possession. It is also believed that he was using illegally obtained weapons, as RCMP have said he did not have a valid licence to obtain or possess firearms in Canada.

The investigation into the killings is expected to take months. Military personnel and equipment have have been brought in to help police sort through the evidence they discover at the 16 known crime scenes.

SHOOTER MAY HAVE BEEN PLANNING FOR YEARS

Pierre-Yves Bourduas, a former RCMP deputy commissioner, said Thursday that the existence of a hit list "makes a whole lot of sense" given that the shooter seems to have planned out his rampage in detail.

"The individual knew exactly where he was going, knew exactly who he was encountering," he told CTV News Channel.

CTV News has also learned that the shooter may have been planning his attack for at least two years, back to when he posed as a former Mountie and tried to buy an old police cruiser from a collector in New Brunswick.

The collector, who is now in his 80s, refused to sell it to him.

Public Safety Minister Bill Blair told reporters on Thursday he's concerned that by dressing up as an RCMP officer and driving a fake police car the shooter manipulated the public's trust in law enforcement in order to carry out the killings.

"People thought they were dealing with a trusted individual. (There's) nobody more trusted in their communities than the local police and that he may have used that trust in order to victimize people," he said.

CHAOTIC SCENE IN PORTAPIQUE AND EVACUATION AREA

On Thursday, audio recordings from first responders posted online showed how paramedics on the scene were aware by at least 11:20 p.m. on Saturday that there was an active shooter in the area, but were still unsure of many other details concerning the situation.

"There's a person down there with a gun," one paramedic said through two-way radio.

"They're still looking for him. The patient we have got shot by him. He was just down there observing the fire, checking out the fire. So there could be other patients around the fire that could be gone already, but we're not sure."

The chaotic scene extended to a nearby fire hall that was being used to house evacuees of the shooting, where two RCMP officers opened fire on Sunday morning. The shooter was not believed to be in that area at the time.

CTV News has learned the officers thought another RCMP officer was, in fact, the shooter and only stopped firing once the other officer identified himself.

A now-deleted Facebook post from The Onslow Belmont Fire Brigade said the gunshots damaged the fire hall, but no one was injured.

Nova Scotia's police watchdog is investigating the incident.

QUESTIONS RAISED OF POLICE ALERTS

As police continue their own probe into the mass shooting, authorities are being dogged by questions about how the public was alerted to the unfolding rampage and why they didn't use the provincial emergency alert system.

Nova Scotia Premier Stephen McNeil said Wednesday that the provincial Emergency Management Office (EMO) reached out to the RCMP about issuing an emergency alert at 10:15 Sunday morning. Investigators were still drafting an emergency notification that would have been sent to mobile phones and broadcast over TV across the province when the gunman was killed at 11:26 a.m., RCMP revealed.

Pressed on the matter at a news conference on Wednesday, Nova Scotia RCMP Chief Supt. Chris Leather said that there were a series of calls between RCMP headquarters, the incident commander and EMO that caused "a lot of the delay."

During the hours-long rampage, RCMP limited their communications with the public to social media. These messages, which would never be seen by the many Nova Scotians who are not active on Facebook and Twitter, had their own delays.

RCMP first alerted the public about a "firearms complaint" at 11:30 p.m. Saturday via a Twitter post that warned residents to stay in their homes and lock their doors. There wasn't another message until 8 a.m. Sunday when police tweeted that there was an "active shooter situation, and that Wortman was likely disguised as an RCMP officer.

More than two hours elapsed between when police learned that the shooter had a police uniform and a vehicle that appeared almost identical to an RCMP cruiser and when that information was relayed to the public.

Nova Scotia RCMP has promised to provide a detailed timeline of events, but officers abruptly cancelled a news conference scheduled for Thursday evening.

RELATIVES OF VICTIMS WANT ANSWERS

Relatives of those killed in the rampage have blamed authorities for not doing more to alert the public to the imminent danger. Darcy Dobson, one of eight children of slain nurse Heather O'Brien, added her voice to that chorus on Thursday, saying an alert would have saved her mother's life.

"It was too little, too late. They shouldn't have been in the process at 10:15 [a.m.]. Our mother was gone at 10:15," she told CTV News Channel.

"I want to know why there wasn't an emergency alert at [8 a.m.] when they knew that man had left Portapique, because that would have saved countless lives – not just my mother's."

Many Americans living in Nova Scotia received an additional alert, as the U.S. Consulate in Halifax emailed a warning about the shooter to all its registered U.S. citizens living in the province.

Meanwhile, the Nova Scotia RCMP Major Crime Unit has launched a tip line for any information related to the killings.

With files from CTV Atlantic and The Canadian Press

Correction:

On Friday April 24, 2020, RCMP denied the report in The Globe and Mail, detailed below, that they had uncovered a hit list created by the killer.