Yes, it was in the affidavit of probable cause. At the bond hearing, it was even stated that he paid for them.
Here is a quote from the bond hearing found here.
DE LA RIONDA: And isn't it a fact to prove that and you have verified that he actually went to that 7-Eleven store and bought some Skittles and a can of tea? Did he not?
GILBREATH: Yes.
DE LA RIONDA: And there's a video of that?
GILBREATH: Correct.
DE LA RIONDA: And he paid for it. He didn't steal or anything. Is that correct?
GILBREATH: Yes.
If they were at the site where the beating took place, then it is inconclusive. However, if, as has been stipulated elsewhere, they had been placed some distance from the place of attack, then that would certainly substantiate George's claim that Martin had been stalking him! Why would Martin have put them down other than an expectation of a physical confrontation.
That would be the same investigator who never asked for Zimmerman’s medical report and said this...
Gilbreath also said Zimmerman’s claim that Martin was slamming his head against the sidewalk just before he shot the teenager was “not consistent with the evidence we found.” He gave no details.