The security video was taken at Trio Tavern along the 3800 block of South Black Horse Pike in Williamstown at 9:10 p.m. on September 3rd.
The video shows what appears to be a male pouring and igniting an accelerant on the bar which is located in the outside patio area.
On that night, arriving firefighters found the deck was on fire and flames spread to the tavern itself.
The fire was brought up to 2 alarms before they were able to get it under control.
The tavern was closed at the time of the fire.
Anyone with information as to the identity of this person should contact Detective Anthony Canonica at 856-728-9800 ext. 235.