LOS ANGELES -- USC football coach Steve Sarkisian said the school has received several calls questioning the authenticity of Josh Shaw's story about saving his nephew from potentially drowning and is investigating the matter.

Shaw said he suffered a pair of high ankle sprains Saturday night after jumping from the second story of an apartment complex to save his 7-year-old nephew, who was struggling in the pool. Shaw said his nephew did not know how to swim.

"Josh Shaw, first and foremost, is a good person and a good kid," Sarkisian said after Tuesday's practice. "He came to us with what had occurred Saturday night, and I have no reason and no history to not believe Josh and his story and what has occurred. Within the last few hours or so, we've gotten a few phone calls contradicting what Josh said occurred Saturday night, so we're going to continue to vet. We're looking at it. Beyond that, I only know what I know. Josh is adamant with what occurred, and we'll continue to vet some of the other stories that have come across our desk and our phones and see where we can go from there."

When Sarkisian was asked who had called and made him second-guess Shaw's story, he said, "I don't want to get into who's calling us. I'd just appreciate it if you guys gave us some time to vet it and look into it so that we can give you a real solid answer instead of more hearsay and what might have or what might not have occurred."

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