SEATTLE. A man accused of gunning down four police officers was shot and killed by authorities yesterday in a case that could affect a potential 2012 presidential candidate who granted him clemency in the past.

Maurice Clemmons, wanted in the Sunday morning fatal shootings of four officers in a coffee shop near Tacoma, Wash., was shot dead by a police officer in south Seattle, the Pierce County Sheriff’s Department said.

The crime received national attention in part because Clemmons, while serving a long prison sentence, received clemency from then-Arkansas Gov. Mike Huckabee, who sought the Republican presidential nomination in 2008 and is considering running again. Huckabee has sought to downplay his link to Clemmons.