Police are still trying to identify about a dozen people they believe took part in last month's disturbances.

But, officials say, that number could increase as officers continue searching for evidence implicating others into the ring that has grown with the help of about 85 tips.

During the March 28-30 disturbances, unruly crowds caused more than $40,000 in damage to campus and the city.

In the days following the riot, East Lansing and MSU police launched a Web site to post pictures and allow tipsters to e-mail information to aide in the investigation.

As a result of tips, city and county officials issued two more arrest warrants on Friday. Those arrests will bring the total to 30 in connection with the disturbances, including 24 MSU students.

Daniel Callton, a hospitality business sophomore, faces charges of rioting, malicious destruction of property - both felonies - and a misdemeanor charge of arson.

Police also are in the process of arresting James Luellen, a Lansing Community College student who faces felony charges of unlawful assembly as well as malicious destruction of property.

East Lansing police Sgt. Mark VanDewouwer said it's expected the two men will turn themselves in today.

The felonies carry up to a five-year sentence and up to a $10,000 fine. The misdemeanor carries up to a 93-day sentence and up to a $500 fine.

Police believe both men were partly responsible for damaging a 1996 Dodge Neon, which was parked outside the Auditorium on March 30.

The car's owner, Alexis Cain, said the automobile was totaled. Under felony law, those convicted can be asked to pay three times the amount of damages.

"I'm glad they're getting into trouble. It was stupid and unnecessary," said Cain, a theater junior. "They deserve what's coming for them if they're caught on camera - actual evidence - that's pretty cool."

Cain, who was practicing in the Auditorium for the play "Oklahoma!" when her car was damaged, said she and her family were forced to buy another car after the riot.

She said she is still shocked someone would do so much damage on their home turf.

She has been asked to appear in court this week and read through four subpoenas. Cain also has to fill out witness testimony.

"I went on the Web site and it's pretty funny, looking at my car being flipped," she said. "I guess it was just in the red zone."

But defense lawyers for those charged with riot-related offenses will attack video and photos and try to argue the tapes don't demonstrate illegal behavior, said Brian Jeffries, one of the attorneys for ASMSU's legal services. They might say the videos don't provide concrete evidence that the people in them are the accused.

Several students have approached MSU's undergraduate student government's lawyers for help.

MSU police Inspector William Wardwell said the investigation could continue even when students return to their homes for the summer.

"It would make it easier if they were still around town," Wardwell said. "We have to have a certain level of evidence even to get a warrant."

To obtain a warrant, a task force consisting of about 12 law officials from the Ingham County Prosecutor's Office and the MSU, East Lansing and Michigan State police departments was created.

Nearly every member of the force has put in more than 100 hours reviewing evidence associated with the disturbances.

Task force officers have been repeatedly watching a three-minute tape comprised of several videos they packaged together.

"I would really love to find him," Wardwell said as he viewed a man jumping up and down on a automobile's windshield until it was smashed.

To view the tipline visit www.dpps.msu.edu/tipline