During the prosecution's opening statements today, the court heard how William Jones walked to Claude Road that night in April from his father's house nearby, looking for his girlfriend, who he believed to be with another man at a property in the area.
The prosecution said Mr Jones admits being in Claude Road, and knocking on the door of Peter Lewis' flat. They said he will claim that Mr Lewis threatened him with a knife, which he grabbed and hit him with, accidentally stabbing him.
William Jones denies murder, and the case continues.
More top news
The last confirmed sighting of the 14-year-old was in Flint on Friday morning.
After a mostly dry evening with a few scattered showers, cloud and outbreaks of showery rain will spread northeast through the night.
Tributes have been paid to former Wales international Mel Charles, who has died at the age of 81.