Investigators are still searching for the handgun used to shoot and kill 36-year-old Natasha Thompson outside a Hamilton home late Monday afternoon.

Thompson, a mother of two, died Monday after she was shot outside a Hamilton townhouse complex. She was pronounced dead on the way to the hospital.

Her boyfriend, Mark Joseph Champagne, is charged with second degree murder.

The shooting took place on Lang Street in east Hamilton. Police are continuing their search for the weapon in the area. The K9 ACTION Unit and investigators have conducted a ground search.

"Hamilton police did an extensive ground search yesterday in the area of Lang Street to Melvin Avenue," said Const. Lorraine Edwards. "Since the time of the incident, more witnesses have come forward and police are able to retrace Champagne's steps."

Det. Sgt. Peter Thom didn't say Tuesday how many shots in total were fired, citing "evidentiary purposes."

Police say they'll also look at surveillance footage in those areas.

Police encourage residents to check their properties and to contact them if they notice anything unusual.

On Tuesday, police arrested Champagne, 41, in connection with the shooting. He turned himself in to Toronto police around 4:30 a.m. 

Police brought Champagne back to Hamilton, where they interviewed him before he was taken to court. He'll appear in Hamilton court again on Nov. 14.

Christopher Hicks, a Toronto criminal lawyer, says that he's been in communication with Champagne, but has not yet been retained as counsel.

Thompson mourned 

Thompson's 16-year-old daughter was in the home at the time. Police say she didn't see the shooting, but heard what led up to it, and the gunshots.

Thompson also has an 11-year-old daughter.

Numerous messages of condolence about Thompson have been posted to social media.

Tina Horn only knew Thompson for a brief period when she lived in the same Hamilton building as her from 2008 to 2009. She hasn't seen Thompson in three years, but posted a message of condolence on her Facebook wall.

Horn told CBC that "if you had a problem and you talked about it with her (Thompson), she always gave wise advice, and it always stayed with her."

Latoya Douglas, a neighbour of Thompson's cousin, has known Thompson since the summer. "She was a very sweet woman and great mother," said Douglas to CBC.

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Natasha Thompson shared two children with Phonesay Chanthachack, who was shot and killed by Hamilton police in February 2012 when he tried to leave a driveway in a stolen van at 15 Albright Rd. (Samantha Craggs/CBC)

This is not the first time tragedy has struck the family.

Thompson shared two children with Phonesay Chanthachack, who was shot and killed by Hamilton police in February 2012 when he tried to leave a driveway in a stolen van at 15 Albright Rd.

An inquest was held into the shooting death. The officer who shot Chanthachack was one of four Hamilton Police Service officers positioned around an east-end parking lot on Feb. 13, 2012, watching a stolen van.

Thompson attended the inquest, and subsequent police board meetings with other families of victims shot or injured by police. 

laura.clementson@cbc.ca