Police have said no suicide note or hit-list have been found at crazed killer Derrick Bird's home.
But officers have seized documents thought to relate to an ongoing investigation by the taxman into 52-year-old Bird's finances. Mystery still surrounds £60,000 which Bird told a friend he had in his account.
He admitted to fellow cabbie Mark Cooper he feared going to jail.
Despite reports that Bird had fallen in love with a young prostitute in Thailand, one cabbie said the killer was more interested in drinking than women.
Mark Cooper, 45, speaking from the Duke Street taxi rank in Whitehaven where Bird attacked his colleagues, said his former friend was so drunk on one flight to Thailand he was kicked off it.
He said: "He loved Thailand. He went three times last year and on the final one he got that drunk he was chucked off in Dubai. They were going to let him fly on the next day but he didn't bother and came home. He didn't bat an eyelid about it. He said: 'It was free drink - what could I do?'. He liked his drink more than his women. We are all the same when we are off the job. I don't think he had been causing trouble on the flight because he never caused trouble. He was just steaming, paralytic. But after he split from his wife there was never anyone special."