MADISON, Wis. -- A Madison man facing 75 felony charges ranging from stalking and sexual assault to child pornography and bail jumping went off the grid for hours while he was supposed to be on a county GPS monitoring system.

It's raising questions about how the program works for offenders.

William Guy was first charged in March with 14 felonies stemming from a violent rampage allegedly committed while his estranged wife was leaving him. Since then, he posted some $70,000 bail and was given a GPS tracking device as part of Dane County's bail monitoring program.

"What the bail monitoring program does is provide some extra assurance to the courts that the order of the courts, as far as bail conditions, are being followed," said Carlo Esqueda, Dane County Clerk of Courts.

As part of his bail conditions, Guy was ordered not to drink alcohol or leave a Tomah Veterans Affairs facility. But offenders like Guy are only monitored on the program by the Clerk of Courts Office on weekdays during business hours, WISC-TV reported.

According to court documents, Guy violated the terms of his bail by drinking and leaving Tomah late at night. But at the time no one was on duty and officers were unable to use the technology to help find him, WISC-TV reported.

According to court documents, a Tomah Police Department officer contacted the Dane County Communications Center to see if the device could be tracked and was advised that individuals on duty were not able to track the device.

Sources close to the investigation said that Guy was not found until 12 hours later, but court officials said this isn't what the program is set up to do.

"The outcome of this case is that the person did come back to court, they had a portion of their bail revoked and I believe they are in jail right now," said Esqueda. "That is the system working, and that is about as fast as it can work. Having staff in the office at off hours wouldn't work to speed up that process because of due process issues involved and the players that have to come into the process."

Esqueda said if it is reported via the electronic bracelet that someone has violated bail conditions, law enforcement is not notified, but rather the court is alerted and a judge might call a hearing to revoke bail or issue a bench warrant for an arrest.

In this case, Guy was caught and arrested, and he is no longer eligible for the monitoring program, WISC-TV reported.

Guy remains in jail on the latest charges of 53 counts of possessing child pornography. His cash bail is set at $22,000, and he has not yet posted bail.

Some close to Guy said they are concerned that if he is able to post bail, he won't be monitored at all.