Authorities have released footage from CCTV cameras showing an attack on a warehouse in Mexico's second city of Guadalajara.
Images show employees scrambling inside as four men fire on the site and seconds later a grenade explodes.
Three workers were killed and two others injured in the attack which took place in January of 2011.
Footage was released after the arrest of the alleged gunman behind the attack, Jose Alfredo Campos, alias "El Freddy" earlier this month. He is the second suspect to be arrested in connection with the incident.
The first gunman detained is already serving time in jail, whilst two of the other assailants are believed to have died in gang-related activities.
It is thought that the gunmen are part of a gang in Guadalajara linked to a host of other murders and kidnappings in the region.
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