WEST PALM BEACH, Fla. -

The dead ex-husband of a South Florida school nurse whose body was found in a sugar cane field would have been charged in her death, authorities said Sunday.

Albert Lambert was found dead of a drug overdose at a residence he owned in Miami, and Kimberly Lindsey's blood was found on his clothing, authorities told The Palm Beach Post.

"The bottom line is we were going to charge him with first-degree murder, no doubt," Sheriff Ric Bradshaw said.

Lindsey's West Palm Beach school reported her missing early last week. Her body was found days later in Hendry County by maintenance workers.

A cause of death has not been released. According to a probable cause affidavit, Lindsey's body was missing its head and fingertips when it was found in a canal, and a bullet was removed from her chest during an autopsy.

The sheriff's office said Saturday that there had been a violent confrontation at Lindsey's Palm Beach Gardens home, "after which the body was removed and taken to the remote area where it was discovered."

Bradshaw said his office put Lambert under 24-hour surveillance after Lindsey's body was found and the missing person case became a homicide investigation. The U.S. Marshal's Office and 25 detectives worked on the case, he said.

Lindsey and Lambert divorced in February, but tensions continued through a child-support hearing last week, authorities said.

The couple had three daughters, ages 16, 18 and 20.

"I hope that they take some comfort that an entire community grieves for them and is praying for them," said Palm Beach County State's Attorney Dave Aronberg.

Lindsey was last seen last weekend after a trip to Florida's west coast, and a text to one of her daughters gave no indication that anything was wrong, authorities said.

Bak Middle School of the Arts reported Lindsey missing. School officials say they will rename their clinic in Lindsey's memory.

Grief counselors will be at the West Palm Beach school Monday to "help both children and adults cope with this senseless act of violence and loss of life," Principal Sally Rozanski wrote in a letter to parents.

"Our heartfelt sympathy goes out to the entire family," Palm Beach County Schools Superintendent Wayne Gent said Saturday. "This is such a tragic event for the school and community."