Complex sentence: On June 8,2015, the Patriots released Spikes due to an ongoing police investigation dealing with an abandoned car belonging to Spikes possibly being part of a hit-and-run.
Split into simpler sentences: On June 8th, 2015, the Patriots released Spikes due to an ongoing police investigation dealing with an abandoned car belonging to Spikes. Spikes was released by the Patriots on June 8,2015 amid an investigation that he was part of a hit-and-run.