Complex sentence: After burying her behind the barn, their boss William Barlow (David Hewlett) arrives with Gavin-having found human DNA in the samples that Elsa worked with, Barlow had confronted Gavin about the possibility of a human hybrid, and learned of Dren's existence.
Split into simpler sentences: After burying her behind the barn, their boss William Barlow (David Hewlett) arrives with Gavin. Having found human DNA in the samples that Elsa worked with, Barlow had confronted Gavin about the possibility of a human hybrid, and learned of Dren's existence.