Teoh Beng Hock's family has called for political parties, NGOs and civil society to help pressure the police to bring the person or persons responsible for Beng Hock's death to justice.

To this end, they are invited to attend a council meeting of the Teoh Beng Hock Trust for Democracy next month.

His sister, Teoh Lee Lan, announced this today at his seventh year memorial service held at Nirwana Memorial Park this morning.

The political aide was found dead in July 2009 after falling nine floors from the 14th floor of the Selangor MACC headquarters, where he had been held overnight for interrogation.

"In a custodial death, the officers who were in charge of detaining and monitoring (the detainee) should be held for the murder according to law, unless they can prove their innocence," she said.

"Commemorating (Beng Hock) is not enough, we should go beyond that and we need follow up with concrete action to get the murderers.

"I am now calling for a council meeting, I want the party leaders and representatives to participate.

"This is to pressure the government to implement the Court of Appeal's decision."

The Court of Appeal had in 2014 unanimously overturned the coroner's open verdict following a lengthy inquest into the death of Teoh.

The death of Beng Hock was caused by multiple injuries from a fall, accelerated by unlawful act or acts of persons unknown, inclusive of the MACC officers, ruled the court.

Following the ruling, police set up a task force to look into Beng Hock's death.

The Attorney-General's Chambers, after scrutinising investigation papers from the task force, found there were no criminal elements in Beng Hock's death.

At a press conference today, Lee Lan said the police had no power to overturn Court of Appeal's ruling, rather, it should implement the court's decision.

Beside Lee Lan, Beng Hock's father, Leong Hwee, and mother, Teng Shuw Hoi, elder siblings Beng Kee and Lee Jun were also present.

Both Bee Lan and her mother could not hold back their tears during the ceremony.

More than 100 attended today's memorial event, where 25 cyclists wearing 'Ubah' shirts rode from Sungai Chua, Kajang.

DAP founder Dr. Chen Man Hin, DAP supremo Lim Kit Siang, acting chairperson Tan Kok Wai, secretary-general Lim Guan Eng, treasurer Fong Kui Lun, Kulai MP Teo Nie Ching, Segambut MP Lim Lip Eng, Selangor exco member Ean Yong Hian Wah, were also present.

Guan Eng asked the public not to give up although justice had yet to prevail seven years after the death of Beng Hock.

"The court of appeal's ruling is significant to us, we cannot give up. We cannot allow the BN government to cover this up," he said at the memorial.

"We cannot forget Beng Hock's case, we need to continue to care about it and dare to speak up. We need to have faith that justice can be done.

"We hope to see Beng Hock's sacrifice bringing about a just, fair and better Malaysia," he added.

Lim, who is also Penang chief minister, also announced that Penang state government will support Beng Hock's family's struggle for justice.