Koops, as Futaa.com exclusively revealed three days ago, has been suspended from duty after a poor run of form, which has seen the club drop from first to third place in the Tusker Premier League.
Weche, who has been Leopards assistant coach under Koops, will take over the club's first team squad in an acting capacity.
The decision to suspend Koops comes after a poor run of form, which has seen Leopards lose three of its last four games in the Premier League.
Defeat to rivals Gor Mahia over the weekend, was the one that broke the camel's back, with Leopards bosses not convinced anymore that the Dutchman is the right man for the job.
Weche has been at the club since July 2011, coming in a few weeks after Koops officially took over the lead role.
Weche a renowned defender and Leopards legend, will thus take over the last five matches of the season, as the club looks to salvage what was once a promising campaign.