Police in Northern Ireland have resumed their search for a teenager from Castlederg who went missing after a night out in Bundoran in 1994.
A team of detectives are using specialist search dogs at a series of rural locations in Co. Tyrone.
The 15-year-old sent missing in the early hours of August 14, 1994 and her body has never been found.
Robert Howard (61) was acquitted of her murder in 205
He was, however, convicted for the rape and murder of Hannah Williams, a 14-year-old whose body was found in Kent in 2002 and is serving a life sentence in an English prison.
Garda and police ask anyone who may have information about Arlene’s last movements to contact them.
READ MORE IN TUESDAY’S DONEGAL DEMOCRAT AND DONEGAL PEOPLE’S PRESS.