Omar Mateen is just the latest in a series of setbacks for security company G4S

Posted at 6:02 PM, Jun 13, 2016

LONDON (AP) — The security company that employed the shooter in the Orlando nightclub massacre has been tarred by a series of blunders and scandals that have raised questions about its competency and ethics.

London-based G4S acknowledged Monday that Omar Mateen, whose rampage left 49 people dead and more than 50 wounded, worked for the firm at a residential community in south Florida.

The ties to the man behind the worst mass shooting in modern U.S. history is the latest dark cloud to loom over G4S. Concerns that the fallout from Mateen's attacks might make it more difficult for G4S to get security contracts contributed to a 5 percent decline in the company's stock Monday.

Founded in Denmark more than 100 years ago, G4S entered the U.S. market in a big way in 2002 with its purchase of The Wackenhut Corp., the country's second-largest security services firm at the time.

G4S is now the world's largest security company, measured by employees. It has 610,000 workers, including about 50,000 in the U.S, according to its website. It earned 227 million pounds (about $324 million at current exchange rates) on revenue of 6.4 billion pounds last year, excluding the businesses it trying to sell or close.

The company provides security for sports and rock stars in addition to 40 U.S. embassies and 32 juvenile-justice detention facilities in the U.S., including 28 residential centers in Florida.

In recent years, though, G4S has had trouble protecting its own reputation.

It created a huge headache during the 2012 London Olympics when it didn't deliver the number of security guards promised in its contract. The British military had to be called in to fill the gap, forcing G4S to help cover the costs.

G4S came under fire again in 2013 when it and a competitor were found to have overbilled the U.K. government for the electronic tagging of criminals. The scandal cost G4S 116 million pounds in settlement charges and 45 million pounds in lost profits.

In a mortifying gaffe, G4S staff in 2011 attached an electronic monitoring tag to the false leg of a criminal, who was able to simply remove the prosthetic — and the tag — during his court-ordered curfew.

G4S defended its handling of Mateen. The company said he underwent a detailed screening process when he was recruited in 2007 and again in 2013 during a periodic review process with "no adverse findings." It also mentioned that Mateen underwent a review by a U.S. law enforcement agency in 2013 without anything troublesome being reported to the company.

The company's screenings include a psychometric test, a drug test, a seven-year criminal history, employment and education check, credit report, social security and driver's license check and a physical fitness test.

Mateen received a firearms license issued by the state of Florida and a security officers' license when he was hired in 2007.

In its statement Monday, G4S said it's cooperating with U.S. authorities in their investigation of the Orlando massacre.