Looking for Thomas, policeman from Brussels, Belgium

Can somebody help me, please?
I live currently in Barcelona, Spain.
I have just met At work this Sunday 24th February 2013 at Flaherty´s Irish Bar in Barcelona young man from Brussels, Belgium, whose name is Thomas, 32 years old and he works as policeman. Unfortunately I haven´t got a chance to get his surname and I´ve got no photo of him neither. He´s about 2 m tall, pail brown spiky hair, blue eyes (I guess) nicely styled beard. He speaks French, English and Spanish and I presume that also Flamish.
He´s been in Flaherty´s with a group of about 8 friends. I don´t know if they are also working as policemen. Two others´guys name are Pierre and Fabrice. They´ve been back in the bar this morning, but I haven´t got the time to talk to him, cause I was busy working.
The reason I am trying to get in touch with him is that I do owe him an apology and it´s really very important for me to do so!
So, please, if anybody can give me some tips, where to look for him, I´ll be really greatful for your help. I´ve tried FB already without success.
I am from Czech Republic, lived in Brussels in 2007. I speak English, German, French and Spanish and of course Czech as well.
Thank you very much for your effort.
Kind regards,
Dagmar