An Indianapolis pastor whose pregnant wife was shot and killed in their home last week said Tuesday that she had no enemies and that her death has left him confused and angry.

Davey Blackburn told ABC's "Good Morning America" that his wife Amanda, who was 13 weeks pregnant, was a selfless person who served others and who was roundly loved.

"That's why this has baffled us as much as anybody. And so we are trusting the investigators," he said.

Blackburn said the hardest thing will be that their 15-month old son Weston, who was in his crib during the Nov. 10 attack and was unharmed, will grow up without his mother.

"She loved the people who were unlovable, gave hope to people who didn't have hope, didn't think they had a future," he said.

Investigators believe the attacker entered the family's home in a normally quiet neighborhood on the city's northwest side at around 6 a.m. after seeing Davey Blackburn leave to go to the gym. On Monday, police released grainy images of a possible suspect that were captured from surveillance video cameras at nearby houses, including one that was burglarized earlier that morning.

The suspect has a hooded sweatshirt pulled over his head in the images, and his face cannot be seen.

"It was such an obscure photo. It's extremely difficult to say that anybody recognized it," Blackburn said. "Our neighborhood was so close and it was such a seemingly safe neighborhood. And so this has devastated all the neighbors."

The couple moved to Indianapolis from South Carolina to found the independent Resonate Church in 2012. More than 2,000 people attended a memorial service for Amanda Blackburn on Sunday.