Man arrested at zoo after powder is found

A man was arrested at the National Zoo on Monday afternoon after authorities said he left behind a suspicious powder with glass shards in the Reptile Discovery House and the Small Mammal House, according to a zoo spokeswoman.

The D.C. fire department said the substance was not toxic — an official described it as corn starch — but it forced zoo officials to close the two attractions to visitors. The zoo also closed the invertebrate exhibit because it connects with the reptile house.

Pamela Baker-Masson, a spokeswoman for the zoo, said the three buildings remained closed the remainder of the day so that police could conclude their investigation and workers could clean. The zoo will be closed should the government shut down.

The suspect’s name was not immediately released pending charges being filed.

Baker-Masson said no visitor nor animal was injured.

— Peter Hermann

Md. man charged in September slaying

District police have arrested a 28-year-old suspect and charged him with using a shotgun to fatally shoot a man two weeks ago in Southwest Washington’s Bellevue neighborhood.

William Hogan of Oxon Hill was charged with second-degree murder while armed. Members of the Capital Area Regional Fugitive Task Force arrested him in Maryland on Sunday evening. He could be arraigned in D.C. Superior Court on Monday.

D.C. police said Hogan is charged with killing Robert Spencer, 21, of Northeast about 10:20 p.m. on Sept. 17. The shooting occurred in the 100 block of Irvington Street SW.

— Peter Hermann

Police arrest suspect in double killing

A 38-year-old man being sought in the killings of a brother and sister this summer in Northeast Washington has been arrested at a relative’s home in Winston-Salem, N.C., according to the U.S. Marshals Service.

Kevin A. Walker faces extradition to the District, where he is charged in a D.C. Superior Court warrant with two counts of first-degree murder while armed.

He is charged with killing Jamahl Jenkins, 21, and Jamie Jenkins, 28, on July 20. The siblings were shot about 3 a.m. in the 5300 block of East Capitol Street NE.

The U.S. Marshals Office in Greensboro, N.C., said Walker was arrested Thursday at his uncle’s apartment in Winston-Salem. A statement from the marshals office said that officers seized clothing at Walker’s apartment.

— Peter Hermann

Man accused of impersonating officer

A former candidate for Alexandria’s city council was arrested this month on a charge that he impersonated a law enforcement officer.

Scott Gordon returned to his car Sept. 19 to find a police officer giving him a ticket, police said. He then revealed a firearm, which he has a permit to carry, and implied that he was a federal law enforcement agent.

Court records show that Gordon has been charged with impersonating a law enforcement officer, brandishing a firearm and driving on a suspended license.

Gordon, a Republican insurance agent, dropped his city council bid last year and endorsed a Democratic candidate. He could not immediately be reached for comment.

— Rachel Weiner

Baby born early after a car crash has died

A baby that was delivered prematurely after her mother was involved in a car crash in Fairfax County died Sunday evening, Fairfax police said.

The baby girl was born after a Mazda MX3 coupe struck a Toyota Avalon being driven by the newborn’s father, police said. The head-on collision occurred early Sunday morning on the Fairfax County Parkway, north of Braddock Road.

The newborn’s parents, who are from Camp Hill, Pa., suffered injuries that were not life-threatening.

The driver of the Mazda was killed, police said. He was identified as 44-year-old Abraham Aragon of Manassas.

A preliminary investigation indicated that Aragon was driving north in the southbound lanes of the Fairfax County Parkway. Police said other cars veered to avoid colliding with the Mazda before it struck the Toyota.

Police are exploring whether alcohol was a factor in the crash.

— Justin Jouvenal