04/07/2016 14:28 EDT | Updated 04/08/2017 01:12 EDT

Family of slain Alberta grandmother ask public for tips to catch killer

CALGARY — The daughter of a 78-year-old woman stabbed to death in her home in southern Alberta is pleading with the public for help in solving the crime.

Lisa Freihaut tearfully told reporters in Calgary on Thursday that she has been sad, angry and frustrated over the "senseless" death of her mother earlier this year.

Irene Carter was found slain in her Lethbridge home on Jan. 17.

Police have said family members went to check on the senior when they couldn't reach her.

Lethbridge police Sgt. Ryan Stef says investigators don't have a motive for the killing.

He says officers are running out of leads and want to talk to any businesses or sales people who may have been going door-to-door in the area.

"At this point, we have not ruled out anything," Stef said Thursday.

"Could it have been a robbery? Could it have been a theft of some sort? That's a possibility."

Freihaut added that she will miss being able to send a Mother's Day card and flowers this year.

"My mom loved her family and friends, especially her grandchildren. They were her pride and joy," she said, crying.

"No family deserves to have to go through this ... If you have any information about what happened to my mom, please contact the Lethbridge Police Service, so they can put my mom to rest peacefully and we can start to heal."