Liam O'Sullivan was a Scottish

Scotland

Scotland is a country that is part of the United Kingdom. Occupying the northern third of the island of Great Britain, it shares a border with England to the south and is bounded by the North Sea to the east, the Atlantic Ocean to the north and west, and the North Channel and Irish Sea to the...

 football player, who played as a defender

Defender (football)

Within the sport of association football, a defender is an outfield player whose primary role is to prevent the opposition from attacking....

 for Hibernian

Hibernian F.C.

Hibernian Football Club are a Scottish professional football club based in Leith, in the north of Edinburgh. They are one of two Scottish Premier League clubs in the city, the other being their Edinburgh derby rivals, Hearts...

, Clydebank

Clydebank F.C.

Clydebank Football Club are a Scottish football club based in the town of Clydebank, West Dunbartonshire, near Yoker. The present club, formed in 2003, is a member of the Scottish Junior Football Association, and currently plays in West Super League Premier Division...

 and Brechin City

Brechin City F.C.

Brechin City Football Club is a Scottish football team based in Brechin, Angus. They are members of the Scottish Football League and play in the Second Division in the 2010–11 season...

.

O'Sullivan achieved success in youth football with Hutchison Vale, and signed a five year contract with Hibernian

Hibernian F.C.

Hibernian Football Club are a Scottish professional football club based in Leith, in the north of Edinburgh. They are one of two Scottish Premier League clubs in the city, the other being their Edinburgh derby rivals, Hearts...

 after leaving school in 1997. He played in the Scottish Football League

Scottish Football League

The Scottish Football League is a league of football teams in Scotland, comprising theScottish First Division, Scottish Second Division and Scottish Third Division. From the league's foundation in 1890 until the breakaway Scottish Premier League was formed in 1998, the Scottish Football League...

 for both Clydebank

Clydebank F.C.

Clydebank Football Club are a Scottish football club based in the town of Clydebank, West Dunbartonshire, near Yoker. The present club, formed in 2003, is a member of the Scottish Junior Football Association, and currently plays in West Super League Premier Division...

 and Brechin City

Brechin City F.C.

Brechin City Football Club is a Scottish football team based in Brechin, Angus. They are members of the Scottish Football League and play in the Second Division in the 2010–11 season...

 during 2000, but then suffered a serious knee injury. As he was battling to recover from that injury, O'Sullivan was found dead in a friend's house in Haddington

Haddington, East Lothian

The Royal Burgh of Haddington is a town in East Lothian, Scotland. It is the main administrative, cultural and geographical centre for East Lothian, which was known officially as Haddingtonshire before 1921. It lies about east of Edinburgh. The name Haddington is Anglo-Saxon, dating from the 6th...

. It was suspected that a drugs overdose, including methadone

Methadone

Methadone is a synthetic opioid, used medically as an analgesic and a maintenance anti-addictive for use in patients with opioid dependency. It was developed in Germany in 1937...

 and ecstasy, was the cause of death.