Gabriela Sanchez, also known by the nickname Gabby, was a woman who lived in Hill Valley in the 20th century. On April 15, 1986, Gabriela and her niece were nearly run over when the second DeLorean time machine arrived from 1997 with the Yugo time machine. The older professor Marcus Irving wanted to stop Marty McFly and Doc Brown from stopping his younger self from using the stolen flux capacitor to finish converting his Yugo GX into a time machine, and he doesn't care if anyone gets killed in the process.