THE Yau Ma Tei police compound has had a gigantic ''visitor'' over the past few months after a stolen excavator used in a fraud case was found in a Pat Heung garage. Excavator driver Lai Tsz-ki, 21, pleaded guilty in the District Court yesterday to obtaining property by deception. He admitted having dishonestly obtained $70,000 from Lam Wing-hang by falsely representing that the excavator's owner had authorised him to sell it. After the hearing, Detective Inspector David Hutchison, of the Yau Ma Tei CID, said the excavator had been kept in the compound since it was recovered. ''The only thing unusual is that it's very big,'' he said. Crown counsel Phyllis Wong said the owner, Kan Wai-sang, parked the excavator at a Yau Ma Tei building site on February 6. Mr Kan returned two days later to find the vehicle had been stolen. With the help of the police, Mr Kan found the excavator in a garage in Pat Heung 15 days later. Mr Lam, who ran the garage, claimed he bought the vehicle for $70,000 from Lai on February 12 at a Mongkok building site. The court heard Lai used a different name in the transaction and told Mr Lam he was selling it on behalf of Mr Kan. Tom Cheng, counsel for Lai, said a fellow driver, Ah Leung, asked Lai to sell an excavator for him in return for $5,000. He said Lai then took $5,000 from the $70,000 he got from Mr Lam. Ah Leung later asked Lai to give the balance to his cousin, Ah Kit, in payments of $5,000 each day. A total of $54,000 was handed over. Ah Kit went missing after police found the excavator. Judge Hawkes called for reports and adjourned the case until January 12.