Pictured: Is this the crocodile that ate a British tourist alive in Australia?

Caught in a trap and with bloody jaws, this is the crocodile that may have eaten a British tourist alive in Australia.

Wildlife rangers are expecting to confirm today whether they have finally caught the killer reptile which grabbed British-born tourist Arthur Booker from a tropical river last week.

The 14ft male crocodile was caught in a trap, bound with ropes and will be X-rayed to establish whether human remains are in its stomach.

A test carried out yesterday, involving the removal of samples from the crocodile's stomach with a special 'search and grab' camera, failed to provide any conclusive evidence whether it was the reptile that consumed 62-year-old Scots-born Mr Booker.

Rangers and police have also captured an 8ft crocodile, whose sex has yet to be determined, and it will be given a drug which will result in it regurgitating its stomach contents. The drug is less effective on larger creatures.

'We're hoping that we'll soon have our answers,' said Mr Mike Devery of Queensland's Environmental Protection Agency.

Rangers from the agency, working with police, have been searching the Endeavour River, near the remote northern Queensland community of Cooktown, since Mr Booker - originally from Banff - vanished when he left his campsite to check on crab pots he had laid in the river.

His wife Doris, who went looking for him when he failed to return, raised the alarm and police later found what appeared to be the marks of a crocodile on the river bank beside the crab pots.

Mr Booker's watch and his sandals were later found nearby, but there was no sign of him.

There were suspicions that a large crocodile, known to local people as Charlie, may have been responsible - but rangers remained sceptical that he was the culprit.

Mr Devery said that the larger crocodile now in captivity was of greater concern and may be the reptile that grabbed Mr Booker.

'It concerned us when it displayed threatening behaviour, such as not swimming away from boats and remaining on the surface, when we were searching the river,' said Mr Devery.

'This particular crocodile over the last few days of searching demonstrated territorial behaviour that we regarded ... as behaviour where we would remove it.'

But he admitted that the cause of its behaviour could have been the arrival of the search boats which might have approached its nest.

As for Charlie, he said it wasn't a crocodile 'that we had cause to be concerned about.'

The wildlife agency said any trapped crocodiles would not be harmed or killed.

Once examined, whether any was found to be the culprit or not, they would probably be relocated to another remote river system.

Mr Booker's disappearance, and presumed death in the jaws of a crocodile, has opened up a fierce debate about whether the reptiles should be culled - or whether tourists should be banned from areas where their numbers are prolific.

One Queensland MP has insisted that 'the lot of them should be shot' while animal protection groups say it is simply up to people to exercise caution when entering areas were crocodiles live.