Concord, N.H. – A Dominican man has pleaded guilty in federal court to distributing methamphetamine in Novel Hampshire, U.S. Attorney Erin Creegan announced Friday. Ariel Castillo-Solano, also known as Jose Antonio Santiago, 36, admitted to one count of conspiracy to distribute a controlled substance, specifically methamphetamine, according to a statement from the U.S. Attorney’s Office.
The guilty plea marks a significant development in a case that began in early 2024, when the Drug Enforcement Administration (DEA) launched an investigation into the sale of multi-ounce quantities of methamphetamine in the Rochester, New Hampshire area. The investigation revealed a complex operation involving Castillo-Solano utilizing a false identity to facilitate the drug distribution, highlighting the challenges law enforcement faces in combating drug trafficking networks. U.S. District Court Chief Judge Samantha Elliot has scheduled Castillo-Solano’s sentencing for June 18.
Details of the Investigation
According to court documents and statements made during the proceedings, Castillo-Solano was operating under the name Jose Antonio Santiago, an American citizen from Puerto Rico, whereas conducting his illicit activities. Between October 21, 2024 and January 10, 2025, the DEA, utilizing a cooperating source and an undercover task force officer, successfully negotiated the purchase of over five pounds of methamphetamine from Castillo-Solano. This initial phase of the investigation established a pattern of drug distribution and provided crucial evidence for the case.
The scope of the operation escalated in January 2025, when Castillo-Solano agreed to sell an additional 15 pounds of methamphetamine, approximately 21 ounces of cocaine, and 40 grams of fentanyl to the undercover officer for $69,000. On January 24, 2025, a planned exchange took place in a Seabrook parking lot. Castillo-Solano stated that his “brother,” later identified as Joel Castillo-Soto, would deliver the drugs via Uber. Upon arrival, Castillo-Soto delivered the methamphetamine, cocaine, and fentanyl, leading to the immediate arrest of both men, according to prosecutors. The DEA’s swift action effectively disrupted a significant flow of dangerous narcotics into the region.
Connection to a Larger Drug Trafficking Organization
The case has broader implications, as authorities believe Castillo-Solano was part of a larger Dominican drug trafficking organization. The DEA announced on March 4, 2026, that Castillo-Solano is a citizen of the Dominican Republic who previously resided in Massachusetts. This connection suggests a potential network extending beyond New Hampshire, requiring continued investigation and collaboration between law enforcement agencies.
This guilty plea follows a separate case involving a Dominican national sentenced for both illegal reentry into the United States and drug trafficking, as reported by the Department of Justice on March 13, 2026. The sentencing underscores the ongoing efforts to address drug trafficking and immigration violations within the state.
Methamphetamine Distribution in New Hampshire
The distribution of methamphetamine remains a serious concern in New Hampshire. According to the U.S. Attorney’s Office, the investigation into Castillo-Solano’s activities began in response to a growing problem of methamphetamine sales in the Rochester area. The Justice Department announcement highlights the commitment of federal and local authorities to combatting the spread of this dangerous drug. Similar cases have been reported recently, including a man pleading guilty to distributing meth in New Hampshire, as reported by Boston 25 News and Yahoo News.
As Castillo-Solano awaits sentencing, authorities are likely to continue investigating potential co-conspirators and the full extent of the drug trafficking organization’s operations. The outcome of this case will undoubtedly influence future strategies for addressing methamphetamine distribution and related criminal activities in New Hampshire and beyond. The sentencing in June will provide further clarity on the penalties faced by Castillo-Solano and potentially reveal additional details about the network he was involved in.
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