Brutal murders on Longboat Key have gone unsolved for 40 years

Despite no arrests, investigators have suspects

As a kid, Terry Longpre grew up across a canal from Michaelson Grove in Manatee County.
 
"They were real pleasant people," Longpre said of the couple for whom the grove was named, Norman "Mike" and Isabel Michaelson. "They would do about anything in the world for ya.”
 
Anne Patterson remembers them as Aunt Isabel and Uncle Mike. "They enjoyed sitting out in the backyard, enjoying the water and the view," Patterson said.
 
But the pleasant memories of the Michaelsons are overshadowed by their mysterious and brutal murders now more than four decades ago.
 
The ABC Action News I-Team was given access to more than seven boxes of case files in the Michaelson murders. They reveal that while the investigation into the murders went nowhere for years, authorities started focusing on a handful of suspects more than 15 years after the killings, which occurred on either Feb. 21 or 22 in 1974.
 
 
The suspects are something the family of the Michaelsons and even some of the original investigators on the case knew nothing about.
 
The five men were no strangers to law enforcement. They had been involved in drug smuggling. But each of them, according to the case files, told investigators they "had no involvement or knowledge" of the Michaelson murders.
 
“NOTHING MADE SENSE”
 
Patterson remembers her Aunt Isabel as a generous person. 
 
"She was smart," Patterson said. "She loved life."
 
After college, Isabel traveled around the world. Eventually, she married Mike Michaelson. The couple moved to Florida and bought an orange grove. By 1974, the Michaelsons had sold their grove and settled into a waterfront home on Longboat Key, a beach town that straddles Manatee and Sarasota counties.
 
Jo Bell was the first police officer at the scene the day of the murders.
 
"The house wasn't ransacked," said Bell, shaking his head. "And then to find Mrs. Michaelson in the trunk of a car. I mean, nothing made sense."
 
Her husband was found in the backyard shot twice in the chest, most likely by a long rifle.
 
"They had to hunt for Aunt Isabel," said Patterson. "They found her in the trunk of the car, stabbed and strangled. What a horrible way to go."
 
Longpre, who hadn't seen the couple in years, was called to the crime scene as a diver with the Manatee County Sheriff's Office, which assisted Longboat Key police in the investigation.
 
"We did an offshore search and worked out way into the beach," Longpre said. "And there actually (were) imprints in the sand at the waterline where a boat had come up on the beach."
 
It was a keel mark from the hull of a commercial fishing boat. The vessel came ashore directly behind the Michaelson home. The impression in the sand gave investigators their strongest clue.
 
"Our theory was at that point that it may have been a drug off-load that went bad," said Longpre. "Maybe they landed on the wrong beach, or possibly had, ya know, ah...the boat engine might have stopped, they ran it aground."
 
In those days, drug-running was rampant. "Boats would come down the Intracoastal and they would drop loads of marijuana," Longpre said.
 
POSSIBLE SUSPECTS
 
Immediately after the murders, investigators tried to piece together what happened to the Michaelsons and speculated that they were confronted by those on the boat that ran aground, maybe to use the couple's phone and call for help. 
 
The investigative files reviewed by the I-Team show detectives in 1990 believed Raymond L. "Junior" Guthrie Jr., now 64, helped whoever killed the Michaelsons escape by freeing the boat that ran aground.
 
As part of a federal grand jury investigation in the '90s, Guthrie told authorities that he lived in the Manatee County fishing village of Cortez at the time of the murders. According to an investigative report, however, he maintained that he "did not get into active smuggling until 1976" – two years after the murders.
 
Junior Guthrie still lives in the area, and the I-Team attempted to reach him without success.
 
The I-Team also reached out to the other suspects who are still alive. Two of them, Roger Black and David F. Capo, responded.
 
Black, 78, admitted talking to detectives about the case. But he still has no idea why he was considered a suspect.
 
Capo, now 62, said he thinks that investigators were just looking at anyone who had ties to drug smuggling in the 1970s.
 
Raymond "Doc" Parker, 64, one of the other documented suspects, has not returned our calls. 
 
The fifth suspect,  Floyd "Bubba" Farrell Capo, died in 1999 at the age of 57.
 
CASE STILL ACTIVE
 
While none of the men were ever charged in the case, police haven't removed them from their list of suspects.
 
Current Longboat Key Police Chief Pete Cumming was just a teenager when the Michaelsons were murdered. But it's a case he'd like to see solved.
 
"It became a difficult case, I think, because there was a real lack of any physical evidence," Cumming said. "At the end of the day, there was not much to go on other than theories and speculation."
 
Even after 40 years, the family hopes someone might know something that could make a difference.
 
"It certainly would be nice to know why," Patterson said.
 
If you have any information concerning this case, contact Detective Kris Roberts at the Longboat Key Police Department at 941-316-1977.
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