This is from the mail I received. He had issues retracting the handle of his case, but as I mentioned I know for a fact he wasn't drunk. He does suffer from a few medical conditions though.
"As an airline our staff see a very wide variety of people and as such are used to meeting and dealing with passengers from all walks of life. This is partly why our crew enjoy their jobs so much.We have now received a report from the crew and pilot. As I was not there at the time, I can only advise you of the content of this report. The report states that XXXX was the last to board and while doing so he did stumble and fell towards the air bridge operator. Once onboard have stated they could detect a strong smell of alcohol from your brother.There were concerns raised by other passengers on this flight, especially as your brother was struggling to keep his balance while walking to his seat. At this stage our crew did approach the Captain, who agreed that the passenger should be removed".