What started as a simple busted headlight pull-over in Frankfort on Friday night ended with a driver in jail on serious methamphetamine charges, according to police. Officers say a routine traffic stop quickly escalated into a felony case when suspected meth and other evidence were found, and 58-year-old John B. Montalvo was arrested on the spot. The Clinton County Prosecutor's Office has since filed multiple felony counts, and Montalvo is being held without bond.
How the stop unfolded
According to officers, the vehicle was pulled over around 8:42 p.m. for having only one working headlight. During the encounter, police say they found suspected methamphetamine and marijuana, which led to Montalvo's arrest. Prosecutors later filed counts related to methamphetamine possession and dealing, and police say he was taken into custody at the scene. The department detailed the stop and arrest in a post on its Facebook page, according to Frankfort Police Department.
Charges explained
The filing outlines charges under Indiana law that turn on how much meth is allegedly involved. One count alleges dealing in methamphetamine as possession with intent of 10 grams or more, and another alleges possession of more than 28 grams of meth, along with a marijuana-related count that factors in a prior drug conviction. Those weight benchmarks push the dealing charge at 10 grams or more into a Level 2 felony and the possession charge at 28 grams or more into a Level 3 felony, consistent with Indiana statutes IC 35-48-4-1.1 and IC 35-48-4-6.1 (Justia, Justia). Those levels significantly increase potential prison time if the charges are ultimately proven in court.
Local enforcement pattern
Frankfort police and the Clinton County Prosecutor's Office have highlighted several similar stops in recent years in which basic traffic violations allegedly led to meth busts. WISH-TV reported on a Frankfort arrest in November 2024 that resulted in multiple meth-related felony filings, and a May 2025 traffic-stop arrest likewise ended with meth charges. The department has said its Narcotics Unit and patrol officers are focused on getting alleged dealers off local streets.
What happens next
The Facebook post notes that Montalvo is being held without bond and that the Clinton County Prosecutor filed the charges, although no arraignment date was listed. If prosecutors move forward, the case will proceed through Clinton County courts under the weight-based felony statutes and the potentially lengthy sentences they carry. For now, it remains an active criminal filing, according to Frankfort Police Department.
