PALM COAST, Fla. -

More than three months after a Flagler County clerk was gunned down in a convenience store, her killer is still on the loose. Now, the family of Zuheily Rosado is suing the owner of that store.

The store clerk left behind a husband and six children, and now the family wants to know if something could have been done to prevent the woman's death.

According to a lawsuit recently filed, the family has pointed questions for the owner of the store.

Keily Roman misses hearing "I love you" and "I'll be home soon." The voice who always comforted the 15-year-old and made her laugh.

"I miss the times that we were just in the living room when we were singing and dancing together," Roman said over the phone.

One week after Valentine's Day, Roman's mom, Zuheily Rosado (pictured, right), was shot and killed at Bunnell's Food Mart, where she worked as a clerk.

Attorney John Phillips, the family's lawyer, calls it "a senseless crime."

"Cold-blooded murder," said Phillips. "I mean, from the video, they walk in, kill her, walk out, there's no other purpose."

Phillips represents Rosado's husband, now suing the store owner for wrongful death and negligence.

Phillips said the owner knew someone had come into the gas station the week before, fought with Rosado and threatened to go back and kill her.

"Despite that they didn't do anything, they didn't add anybody to her shift, you know, we're not asking all of a sudden to put up bullet-proof casings, but you do something," said Phillips.

Phillips said the owner should have provided Rosado security or reported the threat to police.

Rosado's husband is also suing for fraud because the store owner failed to renew his worker's compensation coverage, which would have provided her family with money for funeral expenses, and up to $150,000 in death benefits.

Now, Rosado's husband said he and his six kids are left with nothing, but broken hearts among her entire family.

"It's very hard thinking of my life without her, to survive everyday because I pray every day for her because she really was my everything," said Rosado's daughter, Ulises Angel. "All I wish is for justice for all the kids."