The following incidents were reported in the USC Dept. of Public Safety incident summary between Friday, April 20, and Sunday, April 22.Crimes against a personat 1:06 p.m. on April 22, a juvenile reported that another juvenile touched her buttocks with the palm of his hand while she was standing outside a restroom at the Ronald Tutor Campus Center. The second juvenile was detained for investigation, but after questioning him the officers concluded that there was insufficient evidence of a crime having been committed and he was released.at 8:21 p.m. on April 21, a student reported that a suspect approached him on an MTA bus and forcibly pulled a chain from around his neck while he was standing at the rear door preparing to exit. When the door opened the suspect pushed the student off the bus and the suspect remained on board as it drove away.at 5:02 p.m. on April 21, a non-USC female reported that a suspect touched her buttocks while she was standing in a crowd in front of a booth at the center of campus. The female did not report the incident at the time it occurred. DPS officers were unable to conduct a search for the suspect.Crimes against propertyat 10:45 a.m. on April 20, students and faculty members reported that a suspect has been sabotaging experiments in laboratories at Jerry and Nancy Neely Petroleum and Chemical Engineering Building for the past several months and the incidents have caused safety concerns.at 8:53 a.m. on April 20, DPS officers responded to a report of a suspect attempting to sell a bicycle near Jefferson Boulevard and Catalina Street and detained him for investigation. The bike was registered to a student, but the officers were unable to contact her to determine if a crime had occurred and the suspect was subsequently released. The bike was impounded at the DPS office until the student could claim it.Miscellaneous incidentsat 3:43 p.m. on April 21, DPS officers responded to a report of a suspect selling ice cream from a cart near Marks Tower and detained him for investigation. The officers confiscated the cart and the suspect was released after being advised against trespassing on university property. The owner of the cart was advised that he could claim it at the DPS office.at 7:35 p.m. on April 20, DPS officers responded to a fourth floor fire alarm activation because of smoke in two operating rooms at the Keck Hospital of USC. No fire was found and the officers did not observe any smoke, but they detected the smell of burning rubber. FMS personnel were then requested to check the building but could not locate the source of the smell. The smell began to dissipate and the building was cleared for re-entry without further incident.at 9:27 a.m. on April 20, a staff member in University Gardens reported that a suspect attempted to make unauthorized travel arrangements through her office via email under the name of another staff member. The reporting staff member did not process the request.