Heartbreaker: Cops have found the body of that little girl who went missing about ten days ago in Tracy, California.Sandra Cantu's remains are in a suitcase... that was floating in a pond about two miles from where she was last seen.

In a news conference today, cops said Sandra was wearing the same clothes she was last seenin on March 27 -- a pink "Hello Kitty" T-shirt and black leggings.

An autospsy is underway... and police are promising to catch her killer(s).

H-out