Waco, Texas ? Police found no sign of Patrick Dennehy in a search of the woods where the Baylor basketball player and a roommate were supposedly firing guns.

Investigators asked the FBI to help look on about 50 acres of private land north of Waco last week, but cadaver dogs found nothing, police spokesman Steve Anderson said Tuesday.

According to court documents that cited an unidentified informant, Carlton Dotson, Dennehy’s roommate and former teammate, told a cousin he shot Dennehy in the head as the two argued while firing guns. Dotson said afterward he drove home to Maryland and got rid of the guns along the way, according to the documents.

But authorities said they have no single suspect and have not found a body.

“There’s still a glimmer of hope Mr. Dennehy will show up and say, ‘Hey, this is where I’ve been the whole time,”‘ Anderson said.

Dennehy’s family reported the 6-foot-10, 230-pound junior missing June 19. His sport utility vehicle was found last week in a mall parking lot in Virginia Beach, Va.

His mother, Valorie Brabazon, told ABC’s “Good Morning America” from her Carson City, Nev., home Tuesday that she remained hopeful.

“Our son is still alive, and we’re keeping a positive attitude about it and keeping our hopes up. And we know God is with him,” she said.

Anderson said a Waco investigator interviewed Dotson Friday, but he didn’t know whether police had spoken to him since the search warrant affidavit was made public Monday.

Baylor forward Carlton Dotson looks to pass against Oklahoma State in this file photo. A police informant told Waco, Texas, authorities missing Baylor basketball player Patrick Dennehy was shot by Dotson.

Last week, Dotson told The Dallas Morning News police asked him not to discuss the case and that he had learned of Dennehy’s disappearance from Dennehy’s girlfriend.

“I had to talk to police today, and I told them everything I can tell them and everything I knew,” he said from his home in Hurlock, Md., a rural community on Maryland’s eastern shore.

Hurlock police captain Chris Flynn said his office was ready to help Texas authorities if needed, but they had not received any requests.

“We have nothing at all right now to indicate (Dotson’s) a suspect. He’s just a citizen. It’s a missing person’s case,” Flynn said.

Dotson’s aunt, Pat Waters, said Tuesday that Dotson had returned to Hurlock for the summer and was at her house Sunday — but they didn’t discuss Dennehy. She didn’t know where he was Tuesday.

Waters said Dotson was “probably scared. He’s not a person that talks a lot.”

Dotson, who was raised by his grandmother in the family home where Waters lives, led his high school team to a state championship in 1999. Waters said her nephew “put Hurlock on the map.”

Dennehy, 21, transferred to Baylor last fall. He had played two seasons at New Mexico, where he averaged 10.6 points and 7.5 rebounds as a sophomore, but then was cut after losing his temper during practice.