What Happened
Efren Morales Posadas, 28, of Shelter Island was arrested at 12:10 a.m. on Wednesday, Sept. 16, 2026, and charged with driving while intoxicated as a first offense, having alcohol and cannabis in a motor vehicle on a highway, and failure to keep right, according to the Shelter Island Reporter.
Shelter Island Police stopped Morales Posadas after observing him fail to keep right and stay within his traffic lane. The department did not identify the specific road where the stop occurred. Once officers approached the vehicle, they found he “exhibited multiple indicators consistent with intoxication,” the department stated, and placed him under arrest.
The alcohol and cannabis in a motor vehicle charge indicates officers found both substances present in the vehicle on a public highway at the time of the stop. The Shelter Island Police Department confirmed all three charges, per the Shelter Island Reporter report published Sept. 17.
Morales Posadas was held overnight at Shelter Island Police headquarters. He was released on a Desk Appearance Ticket directing him to appear in Shelter Island Justice Court; no date for that appearance has been made public.
Location & Road Context
Shelter Island sits between the North and South Forks of Long Island, accessible only by ferry from Greenport or North Haven. Its road network is limited, with South Ferry Road, North Ferry Road, and Route 114 as the primary corridors. A lane-drift stop at 12:10 a.m. on any of those roads would place a vehicle within a short distance of the ferry terminals or the island’s residential interior.
Shelter Island has seen multiple DWI incidents in 2026, including a felony DWI charge on Sept. 2 and a DWI arrest following a motorcycle crash on Aug. 3.
Investigation & Legal Proceedings
The Shelter Island Police Department charged Morales Posadas under New York Vehicle and Traffic Law with DWI as a first offense, a separate charge for having alcohol and cannabis in the vehicle on a highway, and failure to keep right. No chemical test result or specific BAC figure was released in the department’s account.
He is due in Shelter Island Justice Court on a date not yet announced publicly. The Desk Appearance Ticket is a non-custodial release mechanism; it does not require bail. His next court date will mark his first formal appearance on all three charges.
What This DWI Charge Means
New York VTL § 1192 sets three tiers of impaired-driving offenses. A DWAI (§ 1192.1) requires proof of impairment by alcohol to any extent and carries fines of $300–$500 for a first offense, a 90-day license suspension, and up to 15 days in jail. A standard DWI (§ 1192.2) requires a BAC of 0.08 or higher and raises first-offense fines to $500–$1,000, with a minimum six-month license revocation and up to one year in jail. Aggravated DWI (§ 1192.2-a) applies at 0.18 BAC or higher and carries fines of $1,000–$2,500, a minimum one-year revocation, and up to one year in jail.
Morales Posadas is charged with a first-offense DWI. At that level, New York also mandates enrollment in the Impaired Driver Program and installation of an ignition interlock device on any vehicle he owns or operates for at least 12 months following conviction. A second DWI within 10 years becomes an E felony, with potential state prison exposure.
Separately, New York’s implied consent law under VTL § 1194 means any driver who refuses a lawful chemical test faces an automatic one-year license revocation and a $500 civil penalty, regardless of whether a DWI conviction follows. No refusal has been reported in this case; the department has not released a BAC figure.
Case Status & Updates
An arrest and criminal charge are accusations. Efren Morales Posadas is presumed innocent unless and until proven guilty in court. The case will proceed through Shelter Island Justice Court, which handles misdemeanor and violation-level offenses on the island.
Long Island Traffic tracks DWI cases through the local court system and updates each report as arraignment outcomes, pleas, and sentencing become part of the public record. Check back here for developments in the Morales Posadas case as they are reported by the Shelter Island Reporter and confirmed through court records.