From what we now know from LE, I think she acted alone, but others in her circle did know about that supposed note that she found giving the name of Whitehall street. FW or even another acquaintance with a Silverado could have went out there searching. They may have even suspected her. I don't know about Johnny's account unless it was just a sincere mistaken
The person who saw the Silverado truck is not Johnny Williams.
Johnny Williams reported a man in a boat on a body of water with a little girl in the boat, apparently sitting up.
Stephen Memory, a Stockton Police Cadet, reported this sighting very shortly after the murder to LE, and is a police academy cadet. A person working through training to join LE. I believe he should be a very credible source.
Going by the timeline we have, I do not think the public knew
anything about the ponds on the date the man was seen and reported by the police cadet.
Obviously FWill knew about the note since he was the one who placed it on the ground, propped up by the trees. IMO, he was watched leaving the note by LE.
JMO, at this time,
Maria
Edited to add: I finally found one of the media reports about this.
Here is the link:
http://www.kolotv.com/californianews/headlines/42831002.html
Snipped info from above link:
"A local resident says he saw a man "acting real strange" at an irrigation pond three days before eight-year-old Sandra Cantu's body was found in a suitcase pulled from the water.
After the gruesome discovery,
Stockton police cadet Stephen Memory, 19, said he spoke to the FBI about what he saw.
Memory reported that he thought it was odd to see a beige Chevrolet Silverado truck parked on the shoulder of the road facing in the wrong direction on the afternoon of
April 3. Sandra's body was found
April 6.
The driver - a white man in his late 40s or early 50s wearing a white baseball cap and gray T-shirt - appeared to be looking down at the ditch beside the road, said Memory, who lives with his parents and sister at a house near the pond. Only four or five cars travel the remote road, which is a dead end, on a typical day, he noted.
"He was acting real strange," Memory said Friday of the driver. "I drove by real slow to get a good look at him. He looked at me real quick and then he turned away. I just kept going."
The FBI referred questions to Tracy police. Sgt. Tony Sheneman said Friday he was not aware of Memory's report and declined to comment on specifics of the pending investigation."