They've Stolen My Wallet!

Hernández and Fernández use the future tense to express the probable present:

"Did you see?  Here you always have to haggle."

"They've stolen my wallet!"

 "Don't talk nonsense!  Surely you've left it at home...or have lost it."  "No, they stole it.  I'm sure of it."

Notes:
I'm not sure why Hernández(?) uses the plural of the past participle (me la han robado) here.
Ello, the neuter pronoun, is not as commonly used as it is in English.