SAN JOSE, Calif. (KRON) – Santa Clara County Sheriff detectives arrested 29-year-old Manuel Luarodriguez for selling a lethal amount of fentanyl to 61-year-old Jeffrey Diaz, the sheriff’s department said in a press release Tuesday.

Diaz, a Cupertino resident, died of an overdose in April. 

(Luarodriguez was first reported as a 28-year-old named Manuel Anthony Rodriguez. The District Attorney’s office clarified his name to KRON4 News when it formally charged him.)

Detectives conducted an investigation for months before determining Luarodriguez was the suspected fentanyl dealer. They issued an arrest warrant for homicide and drug trafficking charges and brought him into custody Tuesday at 1:30 p. m. 

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The Sheriff’s Office said the amount of fentanyl has been increasing in both lethality and availability in California. Anyone with information about this case is encouraged to call the anonymous sheriff’s office tip line at (408) 808-4420.