Complex sentence: Fitzpatrick said he was also puzzled by Castor's response to David's fatal affliction, which developed from a Friday to a Monday when he was found dead, especially considering Castor spent years working for a paramedics company.
Split into simpler sentences: Fitzpatrick said he was also puzzled by Castor's response to David's fatal affliction, which developed from a Friday to a Monday when he was found dead. He said he was especially puzzled by this considering Castor spent years working for a paramedics company.