DENVER -- A woman accused in a hit-and-run crash that killed two Connecticut librarians pleaded not guilty Thursday, and a judge refused her lawyer's request to give her back the pickup involved in the accident.

Sandra Lee Jacobson, 40, of Centennial is charged with vehicular homicide, driving under the influence of alcohol and leaving the scene of a fatal accident.

Police say Jacobson's pickup sideswiped a taxi headed to Denver International Airport on Jan. 28. The taxi went off the road and rolled, killing 54-year-old Kathy Krasniewicz and 71-year-old Kate McClelland of Riverside, Conn.

The cab driver suffered non-life-threatening injuries.

Jacobson is free on bond and is due in court again Aug. 20.

Her attorney, Charles Elliott, asked prosecutors to return Jacobson's pickup, saying she needs it for personal and monetary reasons.

Denver District Judge Sheila Rappaport declined the request after Chief Deputy District Attorney Christine Washburn argued prosecutors may have to show the pickup to the jury during trial because Jacobson has claimed she didn't know she hit a taxi.

Rappaport agreed to have an alcohol monitoring device removed from Jacobson's ankle after Jacobson complained of rashes, open wounds and scarring.

Rappaport ordered Jacobson to work with pre-trail supervisors to find another way to provide daily tests to ensure she's not consuming alcohol.

Elliott proposed twice daily breath tests administered over the phone.

Prosecutors objected to having the device removed.

"It doesn't make sense to take her off the (alcohol monitoring unit)," Washburn argued, adding that the librarians' families objected.

"This defendant is charged with the deaths of two people, so I think it's appropriate that she be monitored 24 hours a day as to her alcohol intake, rather than two Breathalyzers per day," she said.

In April, a judge revoked Jacobson's $200,000 bond and ordered her arrested after the alcohol monitor registered a "spike" that was later attributed to household cleaners. Her new bond was set at $250,000.