TALLAHASSEE, Fla. -- As of Thursday morning, Florida State freshman quarterback Jameis Winston had exercised his right not to speak with Tallahassee police or provide a statement in the ongoing investigation of a sexual assault complaint filed nearly a year ago, a source told ESPN's Joe Schad.

Winston's attorney, Tim Jansen, was originally contacted about the case in February. Since then, no charges have been filed and Winston has not been interviewed. On Wednesday, the case was turned over to the state attorney, who has asked the Tallahassee police to further investigate the allegations.

Heisman front-runner Jameis Winston is involved in a sexual assault investigation stemming from a complaint filed in late 2012. Don Juan Moore/Getty Images

Attempts to reach Jansen on Thursday were unsuccessful.

Georgia Cappleman, chief assistant state attorney, said Thursday she could not speak as to why there was a delay in prosecutors receiving the case. She also said there is no timeline for a decision on how to proceed with the case, though no decision is expected within the next few days.

Typically, a delay can result from a lack of evidence or a lack of cooperation from the accuser.

Florida State released a statement Wednesday saying Winston's status with the team has not changed. The quarterback met with reporters later without addressing the investigation.