In the blame game that's followed the Viger Tunnel collapse on Sunday, one name continues to resurface.

Laco Construction, a private company, was responsible for the maintenance work on the Ville Marie Expressway, providing the maintenance work that preceded the collapse.

Transport officials said Wednesday workers, under a $10 million repair contract, may have removed too much concrete from the walls of the tunnel during repairs.

Several Laco workers were on the site when the support beam collapsed.

Laco, the Riviere des Prairies-based business owned by Luc La Haye, has faced its share of controversy.

In 2008, it was blamed by the CSST for the death of Jean-Guy Meunier, a construction employee who was fatally cruched under a massive wall in St. Constant on the South Shore

In 2009, it was found guilty of tax evasion for using a system of fake invoices for tax deductions. That year, it was fined $94,000 in fines and costs.

In November 2010, Transport Minister Sam Hamad introduced a bill into government suspending the licence of companies found guilty of fraud and other crimes.

Laco declined CTV's request for an interview.

Three engineering firms approved the project and oversaw maintenance work performed by Laco, but were not physically present when the collapse took place.

"Engineer supervision doesn't mean an engineer is sitting by, as the work that is happening. It's about being there for the critical phases, making sure it's happening according to the plan," said Maud Cohen, president of the Quebec Order of Engineers.