More than 200 personal alarms have been handed out to women around the area where primary school teacher Sabina Nessa was found dead.
Sabina's body was found on the weekend near a community centre in Greenwich, south-east London.
Her cousin told ITV News London she was killed just minutes from her home, leaving her family "inconsolable".
The small personal alarm can be attached to keys, handbags or held in the hand. When its pin is pulled, a loud siren will help to draw attention.
A Greenwich Council spokesperson said: "We have been distributing these alarms at events since 2019, but have issued over 200 alarms to women and vulnerable residents over the last two days particularly in the Kidbrooke area.
"The team will continue to do this over the coming weeks, and further alarms will be purchased to ensure we can provide these to as many residents as we can."
Zubel Ahmed, Sabina's cousin, said their family is "inconsolable" after she was taken from them in the "worst way" at the weekend.
Her death is being treated as a murder and a man in his 40s has been released by police under further investigation.
"The shock has not sunk in. She was a beautiful, kind, caring soul," said Zubel Ahmed.
"I express my deepest sympathies for her sisters - Mum and dad are absolutely devastated.
"Nothing is making sense to us, why was she taken from us we just don't know," he added.
'She is the sweetest person': Zubel Ahmed pays tribute to his cousin
Detective Chief Inspector Joe Garrity urged anyone who might have been in the park around the time of the attack and seen someone acting suspiciously to contact police.
He said: “Sabina was found near the OneSpace community centre which we know is a facility used by lots of people and we would ask anyone who was in or around the area and who may have any information to come forward."
Denise Scott-McDonald, Deputy Leader of the Council added: "We are appalled by the senseless murder of Sabina, a much-loved teacher who was killed while simply walking home through a park. This brutal and terrible attack reminds us why tackling violence against all women needs to be at the top of everyone’s agenda."
A candlelit vigil has been planned for Friday night.