Today marks one month since Lifford man David Colhoun went missing.
The 22-year-old escaped from Police custody after he was arrested in Strabane for minor offences on the 22nd May.
The search for David Colhoun is now being concentrated further down the River Foyle near the Red Bridge in Porthall.
Family, friends and Foyle Search and Rescue have been helping with the search.
The search was first concentrated on the River Mourne near Lifford bridge, but after 10 days the search was widened.
PSNI divers, sniffer dogs, Foyle Search and Rescue and the coastgurad all helped in the search.
It's believed that the 22-year-old headed towards the river after escaping from police custody, although it's not known exactly what part of the river Mr.Colhoun went into.
His father Joe has said he feared that his son drowned in the river.
David Colhoun has been missing since the 22nd May.