Mysterious Disappearances: What Happened to Trevor Deely?

Trevor Deely vanished in Dublin, Ireland, back in 2000 in eerie and mysterious circumstances. His disappearance remains one of the most notorious in Irish history.

Deely was caught on CCTV in the dead of night walking back from his workplace’s Christmas party. At some point, he disappeared, never to be seen again.

This article reviews this disappearance. At the end of the article there is a poll where we ask our readers to vote on which theory they believe is most accurate.

Background

Trevor Deely was aged 22 at the time of his disappearance. He lived in Dublin – the capital city of Ireland. He was one of four siblings, with Michael and Ann Deely being his parents.

In May 1999, Deely started working for the Bank of Ireland. He was in this role at the time of his disappearance, which came in December 2000.

The Disappearance

The Bank of Ireland’s Christmas party took place on Thursday 7th December 2000 in Dublin. Deely attended alongside other colleagues.

After going to two venues for drinks, the group moved on to the Buck Whaley’s nightclub on Lower Leeson Street. At approximately 3:25am, Deely left.

It was a stormy evening with strong winds. Deely started walking towards his apartment in the Ballsbridge area of Dublin – which was about a 30 minute walk away. Due to the time, it was dark while Deely was walking.

However, Deely decided to call into his work at around 3:35am. He stopped at the gate to enter and was let in by security.

When in the office, he had a drink and spoke to a colleague called Karl Pender, who was working at the time. Deely also checked his emails and made a “to-do” list of things he needed to do in the morning.

At 4:03am, Deely left the office. He walked in the direction of his apartment. He left a voicemail for a friend called Glen to say he was doing well, and to say he would talk to Glen tomorrow. Then, Deely continued to walk towards his apartment,

Deely was captured on CCTV walking at 4:14am. At some point over the next few seconds, minutes or potentially hours, he vanished.

The next day was a Friday, and Bank of Ireland employees returned to work following the party. However, Deely did not show up. Due to the late night, many were unsurprised, and no effort was made to contact Deely.

But after Deely didn’t show up for work on the following Monday, there was significant concern. Employees contacted Deely’s family, who had not heard from him at all since his party.

They were unable to reach Deely via phone, and he was not found at his apartment. The family then reported Deely as missing to the Police.

The Investigation

The Police launched into an investigation. Crucially though, Deely was only reported missing well over 48 hours after he was last seen. Therefore, valuable time was lost.

The Police spent time combing through CCTV footage, and were able to track his movements after leaving the nightclub. He was tracked going to his workplace – with his colleague Karl Pender able to confirm that he spoke to him.

The first strange sign that appeared was that the CCTV footage showed a man dressed in black waiting outside the gates of the bank around half an hour prior to Deely getting there.

When Deely arrived, he spoke briefly to the man in black. Two minutes after Deely arrived, two other men arrived at the gate. These two men were later confirmed to be colleagues of Deely. However, the man dressed in black was not identified. When Deely left, there was no sign of the man dressed in black.

The final sighting of Deely came at 4:14am on the corner of Baggot Street Bridge and Haddington Road. Around 30 seconds later, a man dressed in black walked in the same direction.

The Police initially believed this was the same man that was waiting outside the bank when Deely arrived. However, this was later deemed inaccurate, with the Police identifying this man and ruling him out of any suspicion.

Unfortunately, CCTV footage failed to bring up any other leads. It wasn’t known what had happened to Deely from that point. Countless hours were dedicated to watching CCTV, but there was no sign of Deely beyond 4:14am.

Deely’s friends and family handed out posters and flyers to try and raise awareness of his disappearance. They also went door-to-door, asking if anyone in the area had seen anything. Substantial civilian resources went into the search.

The Police searched the River Dodder, which was near where Deely was last seen. Similarly, the Grand Canal – also near to where Deely was last seen – was also searched. Neither searches were able to find anything of interest.

Glen – the friend that Deely left a voicemail for, was cleared of any wrongdoing or involvement. No effort was ever made to retrieve the voicemail, which had been deleted by Glen.

The investigation remained open while enquiries persisted. But the days, weeks and then months passed without any update. The case was eventually closed, with no sign of Deely.

Later Developments

The case continued to attract interest. Various forms of media have been released relating to the disappearance – including documentaries and podcasts.

In December 2016, the investigation into Deely’s disappearance was re-opened. Furthermore, in April 2017, a €100,000 reward was offered for information into Deely’s disappearance.

In August 2017, the Police were tipped off by an informant that Deely was murdered by a criminal known to the Police. The informant stated that the criminal was part of a gang that were engaged in the drugs and prostitution trade in the area where Deely vanished. The informant said that Deely was in the wrong place at the wrong time, and was murdered.

The Police searched a three acre area, with the aim of locating Deely’s body. However, the search was fruitless, with no sign of Deely’s body, or any other remains for that matter.

A similar tip-off was received in 2019, with this same tip-off suggesting Deely had been murdered by a known criminal. However, this tip-off didn’t result in any progress in the search.

The Police continue to try and identify the man dressed in black that was waiting at the gate when Deely entered. There is the belief that he may in some way be connected to the disappearance. Despite multiple appeals, the man has never come forward.

In June 2025, the police noted that they continue to investigate and that the case is a missing persons investigation, rather than a murder probe.

Unfortunately, Deely’s disappearance remains unsolved. His remaining family members have continued to try and raise awareness of the case. His whereabouts remain unknown.

Theories

There is very little to work with in this disappearance. There is a distinct lack of evidence – it is as if Deely literally vanished into thin air. However, some theories have been put forward.

We take a look at the evidence for each theory:

Theory One: Trevor Deely drowned in the River Dodder or Grand Canal

One of the most common theories is that Deely fell into either the River Dodder or the Grand Canal – two large bodies of water in Dublin.

Deely’s route home would’ve taken him very near to the River Dodder. There is a chance he could have lost his footing or slipped – and ended up in the water.

Due to the time of year and with it being in the middle of the night, the water would’ve been incredibly cold, and would surely have led to him being unable to move quickly. Unfortunately, drowning is a likely outcome in such a scenario.

The fact that he wasn’t reported as missing for over 48 hours means that his body could have easily been swept away into a larger body of water – potentially the Irish sea – with both rivers flowing into this vast ocean.

However, detractors of this theory have argued that the water was extensively searched, and no sign of Deely was found. Is it feasible that his body would not be discovered at all during all the searches?

Theory Two: Trevor Deely was murdered by someone unknown

Deely may have been unfortunately murdered by someone. It is possible that – unbeknownst to Deely – he was being stalked by someone on his walk home. This may have been the man dressed in black.

The man dressed in black has been a person of interest now for over 20 years. There seems to be something suspicious about him – otherwise, why would he not come forward? Whoever he is remains silent.

While the mysterious man dressed in black seems an obvious suspect, Deely may have just happened to be in the wrong place at the wrong time.

He may have stumbled upon something he shouldn’t have seen, or a crime in action. It is known that gangs operated in the area. The possibility of Deely being killed by a criminal connected to gangs was looked into, and resulted in the search of an area following a tip-off.

If this is accurate, then Deely’s body would’ve probably been disposed of quickly. There certainly seems to be suspicious circumstances in this case.

Theory Three: Trevor Deely was killed after a bank robbery gone wrong

This theory may seem outlandish, and requires a lot of imagination, but is possible. There has been a suggestion that Deely was due to partake in a bank robbery with others – including the man dressed in black.

It seemed a rather strange decision to go to his workplace at the dead of night, rather than going straight back to his apartment. Could there be a darker motive?

This theory proposes that Deely was working in conjunction with others, including the man dressed in black, to rob the bank he worked at. But when he got in, he may have got cold feet.

The theory proposes that Deely then left, and perhaps out of anger or concern that they would be caught, his fellow conspirators killed him.

This theory is a possibility, but arguably isn’t too plausible. Upon leaving the bank, Deely didn’t seem to be looking over his shoulder, or worried. His actions seemed normal.

Reader Vote

The above theories are all possibilities. You can now vote on the theory that you believe is most likely in the poll below. Upon answering, you will see results from our visitors.

Summary

Trevor Deely’s disappearance continues to attract interest. His case continues to receive attention, with his friends and family members battling to continue the search for answers.

There are several unanswered questions in this case. Tragically, it seems that we will never get these answers, though hope remains.