A Venezuelan migrant who crossed illegally into the US has been accused of raping his boss’s 14-year-old daughter while he was living in the family’s basement in Colorado, Homeland Security sources told The Post.

Jesus Alberto Pereira Castillo, 20, was arrested in Denver Tuesday — after nearly three months on the run following the alleged sex assault, according to the Jefferson County Sheriff’s Office.

Police were originally called to the home, where Castillo was living temporarily, on Aug. 29, when they learned that Castillo allegedly “forced himself on the 14-year-old” girl and sexually assaulted her that night. However, he was already gone by the time cops responded. “He left the residence before deputies arrived,” the sheriff’s office said.