Police say Ms Kupfer, 24, was working alone at Croft Home furnishings retailer in Hancock Park on Thursday afternoon when a person wandered into the store simply earlier than 2pm, attacked and killed her, and left by way of a again door.
Newly launched video footage reveals a masked man sporting a hoodie strolling by way of an alleyway behind the shop moments after the killing.
The suspect could be seen strolling calmly in the direction of Oakwood Avenue and La Brea Avenue.
LAPD detective Herman Frettlohr advised reporters Ms Kupfer had been alone within the retailer when she was attacked, and her physique was found by a buyer 20 minutes later.
“We don’t know what the reason for the assault was, or what the motivation was but.”
Police are urging residents and enterprise homeowners within the upmarket central Los Angeles suburb to report any suspicious behaviour.
Ms Kupfer, an architectural design pupil from Pacific Palisades, was a graduate of the College of Miami.
Her grieving father Todd Krupfer advised Fox Information his daughter was a “sort soul” who was at all times attempting to make all the things round her higher.
“She cared about folks,” he mentioned.
Mr Kupfer blamed political inaction for the surging crime ranges in Los Angeles.
“Now we have a variety of politicians that in some way forgot about folks and suppose the important thing to getting elected is to assist the bottom rung of our society and to present them rights and in some way that’s the reply to getting votes,” he mentioned.
“Crime is really spiking, and we’ve got a variety of criminals on the streets that shouldn’t be out.”
In response to her Linkedin profile, Ms Kupfer had been working as a design marketing consultant at Croft Home for a couple of 12 months.
She additionally studied on the College of Sydney in Australia in 2018 as a part of a examine overseas programme.
The LAPD mentioned the suspect is a Black male of unknown age sporting a darkish hoody, sun shades, a white N-95 masks, darkish skinny denims, darkish sneakers. He was additionally carrying a darkish again pack.
“Based mostly on proof found by detectives, the suspect is believed to be homeless,” the LAPD mentioned.