My snake just might have regurgitated!!!

[AlexPan]

Today morning i smelled something in my room like something died. Looked in all of the snake's habitats and found nothing. When i came back home about an houer ago, and came up into my room, it smelled like something died and was decomposing for a long while (i have never smelled anything that bad!).

Anyways i took another theral look into my snake's cages and found something that looked like poo. When i picked it up with a paper towel, i saw a non decomposed tail and legs, but everything als looked like wet poo!

He is California King Snake almost 4 years old, and have shed just 2 days ago. I gave him a dead frozen mice which i have socked in warm water till it became worm before feeding it. It was a fully grown mice but, in the past he have ate mutch bigger ones. On one side of his ocvarium he always have between 84-92 F and on another 68-72. He looks healthy but have being very agressive for the last 2 weeks ( i think due to be hangree). The last time he ate before this one was aproximatly 3 weeks ago.

Do you guys think he pooped or regurgetated? Also i have no vet any where in my area, is there a way i can check for parasites by my selph some how? I can make some pics of him if it will be needed. Thanks every one.