A police crime lab technician said blood found in murder trial defendant Kirk Lankford's truck matched the DNA of missing woman Masumi Watanabe.

Only one person in a population of 304.8 trillion other people has the same DNA, HPD lab analyst Samantha Kashimoto testified in Lankford's murder trial today.

Since the population of earth is only 6.7 billion people, "you would have to search 45 earths" before finding another identical DNA sample, Kashimoto said.

Lankford, 23, is accused of murdering Watanabe, 22, last year.

The body of the victim, a Japanese visitor who was staying with family on the North Shore of O'ahu, has never been recovered.

Lankford denies any involvement in Watanabe's disappearance and presumed death.