Waterbury Kingpin Diaz-Rivera Gets 17+ Years

HARTFORD, CT – Daniel Diaz-Rivera, a 33-year-old Waterbury resident known on the streets as “Danny,” “Lupin,” “Lupito,” and “L,” will spend the next 17 and a half years in federal prison. U.S. District Judge Michael P. Shea handed down the 210-month sentence today, followed by four years of supervised release, for Diaz-Rivera’s role as the head of a ruthless drug trafficking organization that flooded Waterbury with poison.

The FBI’s Waterbury Safe Streets Gang Task Force, along with a coalition of local and federal agencies, spent months dismantling two rival organizations operating in the city. One, led by Angel Quiros, also known as “Papa John,” controlled territory around William Street. Diaz-Rivera’s crew staked out Maple Avenue, pushing crack, fentanyl, and cocaine through a network of street dealers. The investigation wasn’t just about surveillance; it was a full-scale assault utilizing court-authorized wiretaps, relentless video monitoring, GPS tracking, and multiple controlled buys. The evidence painted a clear picture: these weren’t small-time hustlers; they were serious players.

Diaz-Rivera didn’t just manage – he controlled. His operation ran around the clock, dealing crack and fentanyl directly outside a Maple Avenue bodega. He employed shift bosses who oversaw the street-level distributors, creating a tightly-knit, efficient, and brutal distribution system. Investigators even managed to purchase crack directly from Diaz-Rivera himself, solidifying their case. But the operation wasn’t just about product; it was about power, enforced through violence and intimidation. The man wasn’t afraid to use threats to keep his network in line.

The November 29, 2023, arrests of Diaz-Rivera and several codefendants triggered a series of raids that turned up a sickening haul: approximately 700 grams of crack cocaine, over 900 vials of crack, roughly 200 grams of loose fentanyl, more than 1,600 dose bags of fentanyl/heroin, two stolen firearms, a mountain of ammunition, and a staggering $39,000 in cash – over $13,000 of it stashed inside Diaz-Rivera’s vehicle. This wasn’t a business; it was a war waged on the streets of Waterbury, funded by addiction and despair.

Diaz-Rivera pleaded guilty on January 24, 2025, to conspiracy to distribute and to possess with intent to distribute 500 grams or more of cocaine. He’s been cooling his heels in jail ever since. Quiros, facing the same charge, entered a guilty plea on February 11, 2025, and is now awaiting his own sentencing date. U.S. Attorney David X. Sullivan praised the collaborative effort of the FBI, Waterbury Police, Naugatuck Police, Connecticut Department of Correction, DEA, U.S. Marshals, Homeland Security Investigations, Connecticut State Police, Wolcott Police, and Meriden Police.

The case was prosecuted by Assistant U.S. Attorneys Natasha Freismuth and Shan Patel, operating under the Organized Crime Drug Enforcement Task Forces (OCDETF) Program. This isn’t just about taking down one man; it’s about dismantling a criminal network and sending a message to anyone else looking to poison our communities. As Sullivan stated, the Waterbury State Attorney’s Office also provided crucial cooperation in this prosecution. The fight for Waterbury’s streets continues, but today, the city can breathe a little easier.