The latest reward donation comes from David Straz, a retired Tampa banker and philanthropist.
He's contributed $10,000, increasing the reward to $110,000.
In a statement, Straz said he hopes the reward will "hasten the apprehension of a suspect or suspects responsible for these senseless killings and loss of life".
Meantime, the Southeast Seminole Heights Civic Association has organized a dinner for all the law enforcers who are investigating and have protected the community since the first of four murders October 9th.
FHP Arrives in Seminole Heights to Help Police
By Tom Ponzo