Updated 2.08pm
Bernard Grech on Thursday marked 46 years from the murder of his cousin and letterbomb victim Karin Grech.
Karin was killed aged 15 as she opened a letter addressed to her father in 1977, at the height of a doctors' strike.
Her father Edwin, a gynaecologist, had at the time returned from the UK to work in government hospitals. Grech later served as minister for social policy in the Alfred Sant government between 1996 and 1998.
Edwin died in March aged 94.
Grech said on Thursday the murder remained a stain on Malta's history and a dark day for his family.
"My uncle Edwin now knows who killed his daughter not because the case has been solved, but because he died. Justice on earth has not yet been served," Grech said in a Facebook post.
"It's my duty to renew my call on the police to do everything possible - no matter the passing of time - to solve this murder and others."
Robert Abela at Karin Grech's tribute monument in San Ġwann. Photo: Partit LaburistaThe PL marked Karin's murder at a tribute monument in San Ġwann.
Prime Minister Robert Abela said Karin and her family were victims of a political murder as a result of hate.
"Faced with the injustice committed with Karin Grech, we need to send a strong message that no one will escape justice," Abela said, adding that her father Edwin had paid a price for his service to the country with the death of his daughter.
An ADPD Green Party delegation consisting of Sandra Gauci, Ralph Cassar and Mario Mallia also placed flowers on the monument to Karin Grech in San Ġwann.
Party chairperson Sandra Gauci said people needed to continue to reflect on this and other events because as a country they needed to remember the consequences of political violence and what leads to it.
“This sad occasion should spur all of us to continue working in favour of the rule of law and remind us of the need for continued dialogue, particularly where there is a clash of ideas” she said..