Character concerns:
In June 2008, McDaniel was arrested for assault and battery of a high and aggravated nature after an argument with his girlfriend. McDaniel reportedly choked his girlfriend, punched her in the head and chest, and pushed her down a flight of stairs, causing her to seek medical attention for "serious bodily injury".[1]
yeah, i'd label that as concerning.
EDIT: although he at least owns up to his mistake:
“His off-the-field issues are a concern,” writes Softli. “He was arrested in June, 2008 for assault and battery (a misdemeanor). The female was his girlfriend and called police. Once police responded, she said, ‘He covered my head and face with a comforter and choked me, hit me and threw me down stairs.’
“According to my source,” adds Softli, “McDaniel completed an intervention program that wiped his record clean.”
PFT contacted McDaniel about Softli’s report Wednesday, and the former first-team All American was upfront.
“I did put my hands on her,” said McDaniel, insisting the media made it a bigger deal than it was. “Some of that stuff is false. … That’s the only mistake I made in my whole life.”
http://profootballtalk.nbcsports.com/2011/02/23/clemson-safety-mcdaniel-responds-to-espns-assault-report/