"I am sad about the fact that Lalu Prasad Yadavji has been found guilty; .....I am sure he will be able to prove his innocence in the higher court," Singh told reporters here.
"He has been a trusted and an old partner of the Congress Party," he added.
In a big blow to Yadav, a special CBI court in the fodder scam case convicted him and 44 others in a verdict that disqualifies him from Parliament and renders him ineligible for contesting elections for at least six years.