Crymalert, I'm Nancy Grace, Breaking Crime News Now.

Brianna LeCost and boyfriend go to bed after a long night of drinking.

But when the boyfriend wits the bed, LeCost shakes and hits him and chases him outside

and stabs him with a kitchen knife.

Nancy LeCost boyfriend was running to a family member's home to escape the woman's assault

when she stabbed him on his left side.

The wound was so deep the man's lung was punctured.

LeCost made several claims about the attack, including that her boyfriend allegedly choked

her before the stabbing, and that she provided medical aid immediately after getting him

to a hospital.

Louisiana cops take LeCost 25 into custody at the hospital.

She's now single and charged with attempted murder.

Jared Discus posted a photo of his wife on social media with a caption, She's mine.

Promoting Angie Discus family members to ask Houston cops for a welfare check.

At the couple's home, cops find Discus's decapitated body.

Dicas admits he murdered Dis in a jealous fit.

The young couple was married just over three months at the time of the murder, Nancy.

Surveillance video from the day Discus's body was found shows Dicas parked in front of

the store where Diaz worked, going inside and stealing a beer, then drinking it in the

parking lot.

Diaz's friends say they had suspicions.

There was violence in the relationship due to Dicas' tendency toward jealousy.

...