A longtime National Park Service spokesman was found dead in his Northwest Washington apartment in an apparent suicide.

A NPS spokeswoman confirmed that the agency was notified on Sunday night that Bill Line had died.

In a statement issued Monday, Steve Whitesell, regional director of the NPS' National Capital Region, called Line a "dedicated public servant" who brought the skills he honed in the broadcast news industry to his job as spokesman for the Washington area's national parks.

"Since 2001 he was our voice," Whitesell said. "The silence that his untimely death leaves is deafening."

D.C. police said they received a call at 8:42 p.m. Sunday of a suicide attempt with a knife at a residence in the 1500 block of 18th Street. When emergency personnel arrived the victim was not breathing and pronounced dead, police said.

Line, 56, was a staple in Washington media circles as the front man for the park service for more than a decade, starting his post there in October 2001. Line went to the park service from the National Science Foundation, where he worked in public affairs. Prior to 1998, he worked as a producer for the Fox News Channel.