The suspect or suspects entered the clinic, stabbed the victim repeatedly, and left with about $3,000 worth of marijuana and the closed-circuit recording equipment.
Los Angeles Police, city leaders and relatives of Packman gathered Tuesday to urge anyone with possible leads in the case to step forward.
The reward is offered to whoever can provide information leading to the identification, apprehension and conviction of those responsible.
Anyone with information is encouraged to contact Robbery Homicide Division, Detectives Lisa Sanchez-Padilla or Orlando Martinez at (213) 486-6890. During non-business hours or on weekends, calls should be directed to (877) LAPD-24-7.
Anyone wishing to remain anonymous should call Crimestoppers at (800) 222-TIPS (800-222-8477). Tipsters may also contact Crimestoppers by texting to phone number 274637 (C-R-I-M-E-S on most keypads) with a cell phone.
All text messages should begin with the letters "LAPD." Tipsters may also go to LAPDOnline.org, click on "webtips" and follow the prompts.