Police located a neighbor of Spiezio who told officers that he was assaulted by Spiezio at their condo complex a short distance from the crash site, Handfield said.

The neighbor said Spiezio had arrived home appearing disheveled and apparently injured. Spiezio vomited in his condo and then allegedly assaulted the neighbor, causing significant injuries, Handfield said.

Spiezio missed more than a month last season while receiving treatment for substance abuse.

"I was out of control for a while," he said in September. "I learned a lot and I'm ready to start contributing in a good way now."

At the time, Spiezio said he'd been struggling with substance abuse for six or seven months, although he wouldn't disclose the substance, saying, "I'll save that for the book."