Juan-Carlos Cruz -- Murder/Suicide Plan

5/17/2010 9:50 PM PDT

Juan-Carlos Cruz -- Murder/Suicide Plan

Law enforcement sources tell TMZ Juan-Carlos Cruz was allegedly involved in a Shakespearean plot to kill his wife and then kill himself -- and it's all over their inability to have babies.

Sources say the Santa Monica Police Department and the L.A. County District Attorney are fully aware 47-year-old Jennifer Campbell has been despondent for years over her infertility and has spoken openly to friends that she wanted to end her life.

But Campbell is a deeply religious, practicing Catholic and the church views suicide as a mortal sin.

Our law enforcement sources say the information police and prosecutors have "is absolutely clear" -- Cruz was trying to honor his wife's wishes by ending her life.  He then planned on killing himself.

As TMZ first reported, Cruz -- who hosted a show on Food Network -- allegedly approached 3 homeless men in Santa Monica to kill Jennifer.