Complex sentence: However, Agents Kellerman and Hale grew increasingly worried about their mission as Veronica Donovan and Nick Savrinn unravelled more information about the conspiracy, so they threaten to harm L.J. in order to force Lincoln to keep quiet.
Split into simpler sentences: However, Agents Kellerman and Hale grew increasingly worried about their mission as Veronica Donovan and Nick Savrinn unravelled more information about the conspiracy. They intended to threaten to harm L.J. in order to force Lincoln to keep quiet.