A man charged with first-degree murder in the 2012 shooting death of Saskatoon mother Lorry Santos is on trial today in Court of Queen's Bench.

Santos

Lorry Santos (Santos family)

Randy James O'Hagan is one of three men accused of killing Santos in what is now known to have been a botched drug hit.

The other accused are Kyle Halbauer and Joshua Petrin. All three are members of an Alberta street gang, the White Boy Posse.

Lorry Santos

Family and supporters of Lorry Santos enter court this morning. (David Shield/CBC)

Ferdinand Santos, Lorry's husband, was the Crown's first witness this morning. 

He told the court that he heard gunshots and thought someone was in the house. He said Lorry yelled her last words, "oh my God." 

Ferdinand found his wife face down in their front hall. 

Sgt. Sharon Blomquist, with the Saskatoon Police Service Forensic Identification unit, was the Crown's second witness.

Police used shell casings and bullet holes to establish lines of fire by the shooters.

The wrong house

Kyle Halbauer pleaded guilty last November to his role in her death. A statement of facts read in court when he pleaded guilty explained what went horribly wrong that September morning.

Halbauer said the three were sent to Saskatoon from Alberta to kill a man who had left the gang.

But they were given the wrong address.

'I did what I was told. It was kill or be killed.'- Kyle Halbauer

The three men went to the Santos neighbourhood the night of September 10 and staked out the house and planned an entry and exit route.

Death House

Santos house. (CBC)

Just after dawn on September 12, they parked their car two blocks away from the Santos house on Peterson terrace and approached on foot.

"The accomplice went to the front door of the Santos home and rang the doorbell while the accused (Halbauer) remained on a driveway of a residence across the street," prosecutor Matthew Miazga said. 

"When Lorry Santos responded to the ringing of the doorbell by looking through a set of venetian blinds in a window adjacent to the front door multiple shots were fired through that window and into the residence."

Shot in the heart

Halbauer

Kyle Halbauer (CBC)

Eight shots were fired. One round went through both her lungs and struck her heart. She died in front of her family. Halbauer said that he shot at the Santos house — but did not fire the shot that killed her.

Three weeks have been set aside for the O'Hagan trial.

Security at the courthouse is expected to be tight.