Tampa, Florida -- Tampa Police is asking for the public's help to generate leads in an unsolved double murder case. Friday, they held a press conference where family members of the victims spoke out and also pleaded for help.

"Just knowing that I won't have her to be there for me and I won't have her for my son," said Tiana Vause, who is nearly eight months pregnant, in between tears. Her mother, Vickie Sterling, was murdered exactly one year ago.

Tampa Police say 54-year-old Sterling and her sister, 62-year-old Linda Helms, were shot to death inside the home they shared along the 800 block of Lotus Avenue.

According to detectives, a friend who was concerned about the women discovered the bodies one year ago today.

"This last year has been extraordinarily hard on myself and the rest of the family, of just not having closure you know," said Helms' son, Ben Kowalewski.

Investigators said they've worked the case hard, but do not have a suspect. Though they do think the sisters let their killer in willingly.

"We believe based on the crime scene, which is their home where they were living, that they knew the person that came and did this," said Major Brian Dugan with Tampa Police.

Family members said the sisters were very close and where living together to help each other out. At the time of her death, Sterling had just finished school to work in the medical field.

"She was just so happy and proud and I was so proud of her," said Vause.

The womens' children just can't understand the crime.

"She was the sweetest person. She had a very good soul," said Vause.

"My mother was the kind of person that would help out anybody," said Kowalewski.

They're now asking for help themselves to solve this murder, to give the family some sense of peace.

"I just want someone to come forward and give us some information to hopefully make a break in this case," added Kowalewski.

Family members said they will at some point be distributing flyers in the Bay area to help generate tips.

Any information that leads to an arrest and conviction are eligible for a $1,000 Crime Stoppers reward. Call Crime Stoppers at 1-800-873-TIPS or submit your tip online or via text message by texting CSTB plus your tip to 274637. You call also call Tampa Police with any tips you may have.

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