RANCHO CUCAMONGA (CBSLA.com) — Sgt. Joshua Ashley and his military police dog Sirius were best friends.

“He goes, “Mom, … he went to sleep in the bed with me and keeps pushing me and pushing me and pushing me so he takes over the whole bed,’ I had to make him get off the bed,” Tammie Ashley said of her son.

READ MORE: Laguna Hills Student Spouts Racial Slurs At Black Player

The last time Ashley spoke to her son in Afghanistan, he had a request.

” ‘I’m gonna have you take him until I get to where I’m going or when I get out,’ ” Ashley said her son told her shortly before he was killed.

Nearly four years later, Ashley made good on that promise to her son.

Sirius retired from the Marines and was given to her, and she picked him up at the Ontario airport.

READ MORE: Authorities Searching For Missing Teen Girl Allegedly Taken By Her Mother

“It was the strangest thing,” Ashley said. “He was smelling my face like he was going to lick it, and it was almost like ‘I recognize you.’ Like, ‘You were Josh’s mom.’ ”

Josh and Sirius were together when Josh was killed.

“It’s like getting a little piece of my brother back home us. So, it’s really nice having him around,” said Jordan Ashley, Josh’s brother.

There’s a Killed In Action flag in the family’s front yard. Josh’s mom doesn’t want anyone to forget her son.

MORE NEWS: Woman Details Encounter With Man Accused Of Killing Brianna Kupfer

From a small, handwritten note to the big dog taking over the house, reminders of 23-year-old Josh are everywhere, and that’s ,how his mom likes it.