AP

So how did former NFL safety and NFL Media analyst Darren Sharper persuade prosecutors in four states to allow him to serve only nine more years for nine alleged rapes and/or druggings? He agreed to a lot more than simply staying in jail for more than a full decade.

Ken Daley of the New Orleans Times-Picayune recently summarized the 15-page plea memo. Among other things, Sharper must consent to a penile plethysmograph test, in which a sensor will be attached to his genitals for the purposes of measuring arousal in response to specific stimulants. The agreement doesn’t explain the frequency of the testing, the manner in which results will be analyzed, or the consequences for failing the test.

Sharper’s full sentence will be 20 years, with only 10 to be served if he stays out of trouble while in prison. He also will be required to spend three-to-five years after his release in California, as part of a strict sex-offender parole program; he’ll serve the remainder of the 20 years in prison if he violates its terms. Then, Sharper will spend the rest of his life on probation in Arizona, with a 14-year sentence as the “or else” for any violation.

He’ll be required to permanently wear a GPS device, and he’ll be prohibited from ever attempting to contact any of his victims.

Sharper also is prohibited from possessing or consuming alcohol — for life — and from ever entering a bar. He’ll be required to provide urine or breath samples upon request from law enforcement.

He also can’t use electronic media “for any purpose which might further sexual activity,” he’s prohibited from owning any “sexually oriented devices,” and he may not “place or answer any type of personal advertisement seeking or soliciting a relationship with a stranger.”

As surmised when news of the deal first emerged, Sharper will be required to cooperate and to testify regarding his crimes and accomplices, which could help imprison current co-defendants and bring other previously unknown suspects under scrutiny. Failure to cooperate could result in revocation of the agreement, with Sharper possibly being required to stand trial in Louisiana with a life sentence in play.

That last part could be significant, from the NFL’s perspective. With a broad requirement to cooperate with investigators, prosecutors, and juries, Sharper surely will be asked at some point whether other NFL players during his 12 years with the Packers, Vikings, and Saints were involved in similar activities.