By Shannon Sims and Jonah Kaplan. CREATED Jul 16, 2014 - UPDATED: Jul 17, 2014
SHOREWOOD - Special agents want your help to track down the person or people responsible for a string of armed robberies.
The most recent incident happened on Sunday, when investigators report a man flashed a gun at the Hayek's Pharmacy counter on Downer Avenue; the suspect demanded pain killers.
"Things like Oxycodone, Percocet, Vicadin - they're all precursors to a harder drug like heroin," special agent Rob Botsch told TODAY'S TMJ4.
A timeline of the episodes do reveal a pattern - they all took place in the morning.
January 24 -- 9:07 a.m.
April 26 -- 8:53 a.m.
May 19 - 3:56 a.m.
July 13 - 9:13 a.m.
"By all means, this is a violent individual who has brandished a weapon and got physical with employees," Botsch added.
Managers at Hayek's Pharmacy did not feel comfortable going on camera, but a pharmacist told TODAY'S TMJ4 due to the increase of robberies, they will soon no longer fill oxycodone prescription. It simply comes down to a matter of safety.
The Centers for Disease Control reports 5 million Americans are dependent on opiod painkillers. From 1999-2010, the number of drug poisoning deaths involving opioids topped those of heroin and cocaine combined.
The FBI and Shorewood police are offering a $5,000 reward. If you have any information, call the FBI Milwaukee division at 414-276-4684.