TULARE, California.- A home invasion ended in a tragic loss for an already grieving family in California.

Surveillance video from last Thursday morning allegedly shows a thief attempting to break into a home on Berkeley Way in Tulare, California.

He appears to see the camera, then turns and walks toward another nearby house.

That’s where police say Fabián Gámez, 30, tried to enter through the backyard when he was confronted by the owner, Melissa Quinn, 58.

Gamez attacked Quinn with a knife, then his son Raymond Garza, 38, tried to intervene and Gamez began stabbing him, detectives said.

The mother and her eldest son died from their injuries.

“Losing them, not just one but both at the same time, is a big blow for the family. They were our protectors and if something happened they were the first to defend their family members,” said Michael Garza, Melissa’s second son. and Raymond’s younger brother.

He says his younger brother heard the commotion, came out and shot the intruder.

He was able to prevent the suspect from escaping until police arrived.

There were more than six people in the house, including Melissa’s father, whom she was babysitting, and Raymond’s children, ages 7, 9 and 19.

The two youngest children also lost their mother in 2019 and are now dealing with the trauma of another tragedy.

“They are afraid, which my nephew was when he saw his father dying on the ground after being brutally stabbed by the intruder,” Michael said.

ABC Fresno affiliate KFSN learned that Gamez has a history of run-ins with police.

Detectives believe he had been canvassing the area Wednesday night.

“Detectives now believe he may have been shoplifting in the area,” explains Sgt. Rosa Moreno, of the Tulare Police Department.

Gamez pleaded not guilty Tuesday to two counts of first-degree murder and one count of residential burglary under special circumstances.

Loved ones of the victims say they will continue to fight for justice while honoring the mother and son.

“They were the center of attention at any event they attended. Their personalities always shined through,” Michael said.

The family now left with only memories and anguish.

Melissa leaves behind six grandchildren and two children.

Raymond leaves behind his three young children. He was her only living father.

Melissa leaves behind 6 grandchildren and two children.

Raymond leaves behind his three young children. He was her only living father.

The family has created a GoFundMe page to help with funeral expenses.

Gamez will return to court next month.