Complex sentence: He deduces that a cop is likely responsible, and begins suspecting it may be his old friend Charlie McCoy (Mitchell Ryan), who he encounters outside the firing range and who is despondent and suicidal after leaving his wife, Carol (Christine White).
Split into simpler sentences: He deduces that a cop is likely responsible, and begins suspecting it may be his old friend Charlie McCoy (Mitchell Ryan). He had recently encountered him outside the firing range and found him despondent and suicidal after leaving his wife, Carol (Christine White).