New Delhi, July 29 -- Colombia's former President Álvaro Uribe was found guilty on Monday of abuse of process and bribing a public official in a long-running witness-tampering case, marking the first time a former Colombian president has been convicted at trial.

Judge Sandra Liliana Heredia delivered the verdict in court, acquitting Uribe of a third charge related to bribery.

The ruling, which Uribe is likely to challenge through an appeal, is the latest development in a deeply political legal battle that has stretched over 13 years.

Monday's verdict comes following a trial that lasted for six months, in the Colombian capital of Bogota.

Prosecutors presented evidence that the former President used his power to influence witnesses...