Police have nothing to go on in slayings of six in Memphis

MEMPHIS, Tenn. - A day into one of the city's biggest murder investigations in decades - two men, two women and two boys shot and stabbed - police conceded Tuesday they had virtually nothing to go on.

Investigators said they believed the attacker or attackers were not among the dead, ruling out a murder-suicide.

But detectives faced a broad window for the killings: some time between Saturday night and Monday evening, when the six bodies and three wounded children were found in a small brick home on a dead-end street in a poor neighborhood east of downtown.

Officials: Powder found in Vegas hotel-casino room not hazardous

LAS VEGAS - Police have given the all-clear after authorities checked an unidentified white powder a man reported finding in a Las Vegas Strip hotel room.

Authorities say a substance found Tuesday in a room at the Excalibur hotel-casino is not hazardous but have not disclosed what the substance is.

The man wasn't sickened and hotel business was not interrupted after he reported returning to his room and finding the powder on his bed about 9 a.m.

The investigation comes after officials found the toxin ricin at another Las Vegas motel last week. Authorities also searched the Excalibur on Friday in connection with that case, but no ricin was found.

Ariz. Rep. Renzi pleads not guilty to fraud, extortion

TUCSON, Ariz. - Arizona Congressman Rick Renzi has pleaded not guilty to federal charges including insurance fraud, extortion and money laundering.

The three-term Republican appeared in U.S. District Court in Tucson on Tuesday. He was named Feb. 21 with two other defendants in a 35-count indictment.

Renzi is accused of helping with a swap of federally owned mining land that benefited him and a business partner. He's also accused of embezzling more than $400,000 from clients of his family insurance business.

Renzi has been released without bond.

Police in N.C. say report of campus gunman that caused lockdown was a hoax

BOONE, N.C. - Police in Boone, N.C., say the report of a campus gunman that led to a lockdown at Appalachian State University was a hoax.

Authorities in the western North Carolina town say the person who claimed to have seen a gunman has admitted fabricating the story. Police said Tuesday that there was no armed or masked person on the campus.

Audio tapes reveal confusion amid shooting at Wendy's

WEST PALM BEACH, Fla. - Video and audio tapes of a gunman's fatal rampage through a Wendy's restaurant painted a grim picture of him shooting a paramedic standing at the counter and then methodically turning the gun on other customers who screamed and dove for cover, authorities said Tuesday.

The video shows Alburn Edward Blake walking into the restaurant during the lunch rush Monday and going straight to the bathroom. He emerged minutes later to fatally shoot Lt. Rafael Vazquez, who had gone back into the restaurant to exchange a kid's meal toy his child had received.

Mother, daughter guilty of keeping Haitian teen as slave in Fla. home

FORT LAUDERDALE, Fla. - A mother and her adult daughter were found guilty Tuesday of keeping a Haitian teen as their slave for six years in their South Florida home.

Evelyn Theodore, 74, and her daughter, Maude Paulin, 52, were convicted of conspiring to violate Simone Celestin's 13th Amendment rights to be free from slavery and forcing her to work for them.

Paulin, a Miami-Dade County teacher, also was convicted of harboring an illegal alien for financial gain.

Congress plans to subpoena owner of slaughterhouse involved in recall

LOS ANGELES - Members of Congress say they want answers from the owner of a Southern California slaughterhouse involved in last month's massive beef recall.

Congressman John Dingell says members of a House oversight subcommittee will meet today to vote for a subpoena of Hallmark/Westland Meat Co. owner Steve Mendell.

- From wire reports