Police in China managed to nab a burglar by analysing blood from a dead mosquito found at the scene of the crime.

According to the South China Morning Post, the burglar broke into a house in China’s Fuzhou while the owner was away. The Fuzhou Public Security department released a report of the case on its WeChat account, stating that the thief spent the night in the house, cooking himself a meal and using the owner’s bed before absconding with several valuables.

They also found two dead mosquitos, their blood smeared against the living room wall.