WACO, Texas -- Investigators would not comment Monday on any new evidence in the case of Baylor basketball player Patrick Dennehy, whose decomposed body was found in a field after he had been missing for more than six weeks.

McLennan County Sheriff Larry Lynch announced late Sunday that the Dallas County medical examiner's office had identified the body as Dennehy.

Authorities gave no details on a possible cause of death, and Lynch would not say if a weapon was found.

Sheriff's Capt. Paul Wash would not comment Monday on any new evidence in the case or possible motives for the slaying.

Asked about motives, Wash said: "That's probably not something we're going to discuss. We have an investigation to go through. We need to be able to process and work through and see where it leads us."

Searching in the same overgrown field where the body was found Friday, investigators found a head Sunday morning, McLennan County Justice of the Peace Belinda Summers said.

Carlton Dotson, 21, was arrested last week in his home state of Maryland and charged with murder. Dotson, who played basketball at Baylor last season and had been living with Dennehy since spring, remained jailed without bail, awaiting extradition to Texas.

Sunday's search took place just north of gravel pits where authorities looked last week after Dotson's arrest. Investigators used farm equipment to cut down weeds and grass up to 7 feet tall in the rural area about five miles south of Waco.

Authorities picked up Dotson on July 21 after he called 911, saying he needed help because he was hearing voices, authorities said. Dotson told FBI agents in Maryland that he shot Dennehy, according to the arrest warrant affidavit.

Dotson's attorney, Grady Irvin, said Monday police haven't disclosed any details about comments his client made to them.

"They haven't shared any details of the investigation with me," he said when asked about the recovery of Dennehy's remains.

Dotson's mother-in-law, Pam Bayuk, told The Dallas Morning News that he told her last fall he was hearing voices, seeing visions and having trouble controlling his thoughts, the newspaper reported Monday.

This spring, Bayuk said, she spoke with one of Dotson's coaches at Baylor, telling him several times she was worried about Dotson's mental stability. The school, citing privacy laws, refused to comment to the newspaper.

Dennehy's mother and stepfather, Valorie and Brian Brabazon, and their teenage daughter came to Waco from their Carson City, Nev., home last week to retrieve the player's belongings.

They were on the road back to Carson City when the body was identified.

"We're going to keep on going," Brian Brabazon told the Fort Worth Star-Telegram. "There is nothing left for us to do right now. His body is coming back home, and his spirit is in heaven. As sad as we are, at least we know Patrick is safe and sound with the Lord."

The player's girlfriend, Jessica De La Rosa, sobbed when she learned the body had been identified.

"We were still praying for a miracle. We didn't get a miracle," she said.

Dennehy's family has decided not to return to Waco, De La Rosa said Sunday afternoon.

"Technically, there's nothing we can do out there," De La Rosa said from her Albuquerque home.

Dotson and Dennehy arrived last summer in Waco, about 100 miles south of Fort Worth, on basketball scholarships.

Dennehy, because of NCAA eligibility rules, had to sit out a year after transferring from New Mexico, where he was kicked off the team for losing his temper.

Dennehy's family reported him missing June 19, seven days after he was last seen on campus. Dennehy's vehicle was found abandoned in Virginia Beach, Va., on June 25.

Baylor President Robert B. Sloan Jr. notified faculty, staff, students and alumni Sunday about the identification of the body, saying in an e-mail that "today our worst fears were realized."

He asked Baylor employees to pray for Dennehy's family and for Dotson. Sloan said a campus-wide memorial service would be held for Dennehy in the fall semester at Baylor, the world's largest Baptist university.