Dharun Ravi's defense to call witnesses in Rutgers spycam case

(CBS/AP) NEW BRUNSWICK, N.J. - The first defense witnesses to be presented in the trial of former Rutgers University student Dharun Ravi, accused of using a webcam to spy on roommate Tyler Clementi, could be a pair of investigators.

Pictures: Tyler ClementiPictures: Rutgers Spycam Trial

One of the investigators, Frank DiNinno of the Middlesex County Prosecutor's Office, was frequently mentioned during the 10 days that prosecutors made their case against Ravi.

A handful of the Rutgers students who testified referred to him as "Frank," and Ravi's lawyer seemed to be trying to raise the idea that he was too friendly with the students.

The prosecution rested Thursday after calling nearly two dozen witnesses and presenting about 100 pieces of physical evidence.

Ravi is charged with 15 criminal counts, including bias intimidation, invasion of privacy and seven charges that he tried to cover his tracks.

Clementi committed suicide by jumping off the George Washington Bridge in September 2010, just days after the alleged spying.

Besides the investigators, defense lawyers say they plan to call additional college students and perhaps other witnesses, some of whom will be asked to testify about the former student's character.

They have not said whether Ravi himself will testify.

Complete coverage of Tyler Clementi and the Dharun Ravi trial on Crimesider