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.