DALLAS -- It's been three months.

Twelve weeks.

Ninety days.

Since Dallas was changed forever.

For the Zamarripa family, that short period of time feels like an "eternity;” like their son, father, and friend has been "gone forever."

A photo of Patrick Zamarripa sits on the mantel.

"We’re used to him coming in, sitting around and talking. He's just not here any more," said his step-mother Maria Zamarripa.

Patrick Zamarripa was one of five officers fatally ambushed July 7 while they patrolled a protest downtown. His step-mother and his father, Rick, say life without him is incomplete.

Patrick Zamarripa was a diehard Texas Rangers fan.

But what they do say has helped in the journey to healing has been all the support they've received, from strangers to our nation's leaders. This weekend, for instance, the Zamarripas and the families of the other fallen soldiers will be honored at the Texas/OU game.

"This is the one the attorney general gave me," Rick said, showing us a coin he keeps in a bin full of things that remind him of his son.

This week, the Zamarripas met privately with U.S. Attorney General Loretta Lynch during her visit to Dallas.

"She offered her condolences," Rick said. "She said, ‘Patrick […] means a lot to this nation. He showed a great example of leadership, to fight for everyone's freedom.’”

Rick Zamarripa visits his son's grave.

Rick says he made sure to stop by his son's resting place before and after the meeting.

"I just told him, ‘The U.S. attorney general had come to see us and talk to us,’” Rick recalled saying at his son's headstone. “’I’m never going to let anyone forget you, you’ve done a lot for this country.’”

And that's all they want: for those to remember what their son and four other sons sacrificed, even as the days, months, and eventually, years, pass.