A three-week long investigation by the Fullerton Police Narcotics Unit culminated with the arrest of three suspects and the seizure of 26 pound of crystal methamphetamine, 2.6 pounds of heroin and more than $17,200 in cash. The investigation involved weeks of surveillance and seizures of narcotics and cash at four storage units in Anaheim. The narcotics have a street value of more than $566,000, said Det. Matt Martinez, the lead investigator on the case. “This is definitely one of the bigger seizures we’ve had in Fullerton,” said Sgt. Tony Diaz, Narcotics Unit supervisor. “What we realize is that drugs in…