Carlos Guillermo was 23 when he was killed in Tucson, Arizona, on October 18, 2011. Beyond the date, age, and location, specifics about how he died have not been publicly disclosed and the circumstances remain unclear.

No arrests or suspects have been publicly identified in connection with his death, and the Tucson Police Department has provided no significant updates. The case is unsolved and remains a cold file, leaving friends, family, and the community without closure.

If anyone has information about Carlos Guillermo or the events of October 18, 2011, please come forward and contact investigators who are handling the case.