Police in suburban Dallas say a 45-year-old man charged with murder after posting a photo on social media showing his girlfriend's lifeless body says the pair had a suicide pact.

The Dallas Morning News reports (http://bit.ly/1spEPd8 ) that court documents show Kenneth Alan Amyx told police he "had to finish ... off" 43-year-old Jennifer Lee Spears after she "chickened out" of an agreement to "stab one another until they died."

Police forced their way into a Plano apartment Spears' sister called them Sunday. They found Amyx bleeding from superficial knife wounds and his girlfriend dead.

Amyx took a photo of himself, bloodied, with Spears' body and posted it on Facebook. The image has since been removed.

He's being held on $600,000 bond.

___

Information from: The Dallas Morning News, http://www.dallasnews.com