Juan-Carlos Cruz's Wife -- In Misery for Years

5/17/2010 4:18 PM PDT
Law enforcement sources tell TMZ Juan-Carlos Cruz's wife was deeply despondent because she could not have children.

We're told Jennifer Campbell is very religious ... an active member at her Catholic church.  Our sources are suggesting the misery over her not being able to bear children may have a direct bearing on the case.  We're told she has been "deeply despondent for years."

Cruz has been charged with solicitation of murder and attempted murder and faces life in prison.