SAN DIEGO—A man who trafficked a 14-year-old girl for sex in San Diego was sentenced on Sept. 20 to nine years in federal prison.

The U.S. Attorney’s Office said the investigation into 28-year-old Pasadena resident Daylan Lamont Camp began after commercial sex advertisements were discovered featuring the 14-year-old victim, who had been reported as a runaway by officials in Los Angeles County.

One of those ads offered commercial sex in San Diego, according to prosecutors, and an undercover operation held in late 2020 led police to a hotel, where the girl was found.

A search of her cell phone turned up conversations between the girl and Mr. Camp, in which they discussed her engaging in commercial sex work, prosecutors said.

According to the U.S. Attorney’s Office, Mr. Camp arranged for the girl to travel from the Los Angeles area to San Diego on a bus. Once in San Diego, she “engaged in commercial sex acts and provide[d] the proceeds of these acts to the defendant,” the U.S. Attorney’s Office said.

Mr. Camp pleaded guilty last year to one count of conspiracy to engage in sex trafficking of children.