The serial killer gave four men fatal doses of the date rape drug GHB at his flat in east London, then discarded them at locations just metres away.
He murdered four men and sexually assaulted several others.
The families of the four murdered gay men shared their stories at an inquest.
The inquests are being held at Barking Town Hall in east London, just yards from where four men were found dead during Port’s 16-month killing spree.
Coroner Sarah Munro QC said the inquests would look at the ‘competence and adequacy’ of the police investigations into his crimes.
A senior Metropolitan Police officer offered an apology to the victims’ families.
Over 16 months, four young gay men were killed after being given fatal doses of GHB by Port.
Anthony Walgate, 23, Gabriel Kovari, 22, Daniel Whitworth, 21, and Jack Taylor, 25, were killed between June 2014 and September 2015.
Priti Patel announced that she will tighten the restrictions around GHB and related substances by moving them from class C to class B.
Ministers will publish proposals to change the law that prevented the accomplice in the Manchester Arena bombing from getting a whole life order.
Hiran Chauhan died in the early hours of July 3 last year after a night spent with Neil Cuckson.
The Attorney General has referred the case of Reynhard Sinaga to the Court of Appeal over his ‘unduly lenient’ 30-year jail term.
Reynhard Sinaga has been jailed for life after being found guilty of 159 offences involving 48 men.
Detectives said posts which identify sex attack victims constitute a criminal offence, and risk jeopardising an ongoing criminal investigation.
Greater Manchester Police have set up a dedicated incident room since the Indonesian student was jailed for a minimum of 30 years on Monday.
