OAKLAND -- Prosecutors are still reviewing police reports and expect to charge a 23-year-old San Jose woman with murder on Tuesday after the brutal killing of her 7-month-old son, a spokeswoman for the Alameda County District Attorney's Office said Monday.

Ashley Renee Newton remains in isolation for her own protection at Santa Rita Jail following her arrest on suspicion of murder Saturday afternoon in Del Valle Regional Park in Livermore, a spokesman for the Alameda County Sheriff's Office said.

Newton is scheduled to be arraigned on a murder charge on Tuesday afternoon at a Pleasanton courthouse.

At 10:30 a.m. Saturday, Newton rammed her gray Honda Civic into large rocks near Camp Arroyo in the park, causing extensive front- and rear-end damage while the baby boy sat in his car seat in the back seat. At some point, she took out a pocket knife and stabbed the baby multiple times, killing him, police said.

Both the mother and the baby were covered in blood, police said. Newton was treated for a self-inflicted stab wound to her arm before she was jailed without bail. The baby was pronounced dead on the scene.

Officials did not say Monday where the baby was stabbed. When California Highway Patrol officers responded to the crash, they did not see blood in the car, which was running.


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East Bay Regional Park District spokeswoman Emily Hopkins said Monday afternoon that the baby's name would be released Tuesday ¿through court documents. The cause of death was also expected to be released Tuesday.

The Honda used by Newton is registered to her and a man named Daniel Patrick Sherman, according to Department of Motor Vehicles records. Police said detectives interviewed the father of the child on Sunday, but they did not identify him publicly. Authorities said the San Jose man, who last spoke to Newton on Friday, has not been arrested or implicated in the crime.

Newton is originally from North Carolina, has lived in both Fremont and San Jose, and has no family in the immediate area. Relatives in North Carolina could not be located Monday.

Online searches of public records and social media networks also did not turn up any information for either Ashley Renee Newton or Daniel Patrick Sherman.

East Bay Regional Park District police Sgt. Tyrone Davis said Sunday the woman made "several spontaneous statements at the scene that implicated her as being the sole person responsible (for the slaying)." Detectives continue to investigate and have not released information about a motive in the killing but said Sunday that it appeared unlikely that Newton had attempted to kill herself.

Police said that unspecified evidence at the scene suggested the woman may suffer from depression, but officials have yet to confirm any clinical mental health diagnosis.

A warrant to search Newton's car was processed Sunday, and toxicology tests are pending to determine whether she was on drugs at the time of the killing, police said.

Staff writers Natalie Neysa Alund and Rick Hurd contributed to this report. Contact Kristin J. Bender at kbender@bayareanewsgroup.com. Follow her at Twitter.com/kjbender. Contact Malaika Fraley at mfraley@bayareanewsgroup.com. Follow her at Twitter.com/malaikafraley.