RICHMOND, Calif. -- For the fourth straight day, several dive teams and boats equipped with side-scan sonar searched the chilly waters of San Francisco Bay for more evidence in the death of Laci Peterson and her unborn son, Connor.

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Ted Rowlands, Peter Keane Comment On Monday's Search

Whether or not they have found anything in the murky, silt-filled shallow waters is a subject of speculation. The divers and Modesto police were not talking on the record.

But Peter Keane, a veteran attorney and dean of the Golden Gate University Law School, said it was apparent that the divers were looking for something very specific.

"It (the intensity of the search) means they are looking for something specific," Keane said. "It was probably triggered by the results of autopsy. Something about the autopsy triggered something relating to what it is they are looking for -- cables, cement -- something about that body told them that there was something down there very specific to how the body was weighed down."

Joining the local divers in the meticulous search was an elite FBI team using equipment that allowed them to stay under the surface for long periods of time. The major obstacle the divers face in the 12-foot water was that visibility was nearly zero meaning they had to search the muddy bottom by hand.

Meanwhile, Jean Bonadio came forward Monday to say she may have found some additional evidence in the case while walking along the shore of the Richmond park where Laci Peterson's body was found.

"I have made a total of five trips here and out of the five, two of the trips I have found potential evidence," she said. "I have no idea if they really are evidence or not."

Bonadio has turned a piece of tarp with duct tape on it and other piece of tarp over to the Vallejo Police.

Authorities also did not know when Laci and Connor Peterson's bodies would be released for burial.

The judge in the case has ordered that the bodies remain in possession of the Contra Costa County coroner's department. Scott Peterson's attorney, Mark Geragos, has said he wants this own expert to do an autopsy on the bodies.

The body of the Modesto woman, who was eight months pregnant when she disappeared in December, and her unborn son washed onto a Richmond shoreline last month.

The badly decomposed remains were found several miles north of where Peterson's husband, Scott, said he went sturgeon fishing on Christmas Eve -- the day he says he last saw his wife.

Laci's husband -- Scott Peterson -- was arrested last month and charged with two counts of murder and faces the possibility of the death sentence. He has pleaded innocent and is jailed without bail.

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