Deputies arrest 19-year-old suspected of several sexual assault crimes

A 19-year-old has been arrested in connection with several crimes related to the sexual assault of a minor in Portola Valley, in unincorporated San Mateo County.

James Nell Jr. was arrested on suspicion of lewd acts with a child under 14 years old, oral copulation with a child under 14 years old, sexual intercourse with a minor and furnishing harmful matter to a minor, according to the San Mateo County Sheriff’s Office.

In August, sheriff’s office detectives began investigating a report of a sexual assault case involving a minor under the age of 14 that occurred on July 1.

Deputies said the investigation produced information and evidence that Nell allegedly sexually assaulted the victim in the suspect’s home in Portola Valley.

Nell was arrested on Thursday in San Mateo.

Deputies said the investigation is ongoing, and the assault is believed to have been an isolated incident.