Video with Liam`s brother.
http://www.bbc.com/news/newsbeat-43072991
http://www.bbc.com/news/newsbeat-43072991
rbbm.Eamonn's stag do
The family revealed police are investigating a possible sighting of a "confused" man on Wednesday in the Buxtehude area of the city.
Speaking to Newsbeat in Hamburg, Eamonn has sent a message to Liam, saying: "Please, please come home. Everyone misses you. You're very much loved."
"I don't know what happened to you, just please get in touch, find a way."
Until Liam's family finds out what happened, Eamonn's wedding won't be a priority.
"The wedding is not even a thought to me or my fiancee", he says.
"It won't be going ahead without Liam.
"I can't even say 'if'. When we bring him home, we can worry about the wedding. It's not a thought just now. We're just doing whatever we can to find him."