You head out on the weekend looking for a good time and mostly that's what you find

But every once in a while even though it's most certainly not on their minds.

People head out with friends and tragically,

it's the last time anyone sees them ever again.

Here are five haunting stories of party goers who vanished.

Number five, the unexplained disappearance of Trevor Dealey.

In the heart of Dublin, Ireland on December 8th of 2000, Trevor Dilly, a 22-year-old IT professional attended a Christmas party with his colleagues.

And at night as a cold rain drizzled on the city streets, he would vanish without a trace.

To this day's haunting last moments were captured on CCTV cameras, and his disappearance

remains one of Ireland's most perplexing mysteries. Born on August 15th of 1978 in Nas, to Michael and Ann Dealy.

Trevor was the youngest of four siblings.

Described as an easy-going person, he wasn't particularly known for being a

stellar student, except in math, which he had a passion for. After an initial foray into business studies at the Waterford Institute of Technology,

Trevor Switch to computer science, and by May of 1999 he was carving out a budding career at the AIB Bank on Leeson Street in Dublin.

He had just returned home from an amazing trip out to Alaska. It was December 8th and after a night out on the town that

ended around 325 a.m. A series of chilling events took place. With taxis on strike at the time, Trevor chose to walk home,

stopping at his office along the way.

CCTV footage captured a mysterious man in dark attire loitering outside the bank for nearly 30 minutes prior to his arrival.

The man approached Trevor when he got there, talking him briefly before Trevor then went inside.

Two other men were spotted on camera, though they were identified as bank employees.

Inside, Trevor seemed normal, chatting with a colleague, checking emails, and even jotting

down tasks the following morning.

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