A youth soccer coach charged in the killing of a 13-year-old California boy was previously accused of preying upon other children, prompting authorities to make a public plea for information about other potential victims.

The alleged murder of a missing youth soccer player by his illegal immigrant coach in California was "the result of failed border policies," a U.S. attorney said.

Police in California are searching for additional victims who a youth soccer coach may have sexually assaulted after he was officially charged with the death of one of his 13-year-old players.