David O'Halloran, 18, of Kilmaurs, Ayrshire went missing in January after a night out with friends in Stirling.

The last sighting of him is on CCTV footage and shows him crossing Henderson Street, Bridge of Allan, near Stirling at around 2.20am on January 18.

Police say a taxiwas in the area minutes earlier and officers are keen to speak to its passengers who were dropped off near a golf club in the area.