A hair brush, a pink slipper and sunglasses.

Those were some of the items used by a dog handler as he sought to track the whereabouts of Laci Peterson shortly after her disappearance.

Christopher Boyer — a volunteer for a search and rescue team — is on the stand at Scott Peterson´s murder trial explaining how dogs pick up scent and follow trails as they search for missing people.

Prosecutors say the tracking dogs picked up Laci Peterson´s scent at the Berkeley Marina where Scott Peterson claims to have gone fishing alone the day his wife disappeared.

The prosecution is hoping to use the testimony from dog-handlers to show that´s where Scott Peterson loaded his wife´s body into a boat to dump her in San Francisco Bay.