A Calaveras County sheriff's spokesman says investigators have ruled out a 44-year-old man…accused of a trying to kidnap a toddler…as a suspect in last week's killing of Leila.

Sgt. Chris Hewitt said at a news conference last night that authorities found no link between Tuesday's attempted kidnapping of a 15-month-old girl in Placerville and Saturday's slaying of Fowler in her home about 50 miles away in Valley Springs.

Meanwhile, Hewitt says a potential witness of Leila's killing has recanted her statements about seeing a possible suspect running from the girl's home…and "is no longer credible."

Hewitt says that while meeting with a sketch artist and detectives Wednesday, the unidentified witness refused to provide a description so that a composite sketch could be made of the man.