Suspect custody murder Italy dnt kaye ac_00014720.jpg
Suspect custody murder Italy dnt kaye ac_00014720.jpg
Now playing
02:18
Arrest made in death of American Ashley Olsen
Facebook
Now playing
01:09
Police: Bulgarian journalist raped, murdered
Authorities are investigating the scene in East Austin, Texas, after a teenager was killed and a woman was injured in the second Austin package explosion in the past two weeks Monday, March 12, 2018. Authorities say a package that exploded inside of an Austin home on Monday is believed to be linked to a deadly package sent to another home in Texas' capital city earlier this month. (Ricardo B. Brazziell/Austin American-Statesman via AP)
Ricardo B. Brazziell/Austin American-Statesman via AP
Authorities are investigating the scene in East Austin, Texas, after a teenager was killed and a woman was injured in the second Austin package explosion in the past two weeks Monday, March 12, 2018. Authorities say a package that exploded inside of an Austin home on Monday is believed to be linked to a deadly package sent to another home in Texas' capital city earlier this month. (Ricardo B. Brazziell/Austin American-Statesman via AP)
Now playing
02:05
Police: Deadly blasts in Texas connected
Spalding County Sheriff's Office
Now playing
01:28
Second killer pleads guilty in 1983 cold case
Frank Pomeroy, Wife AC360
CNN
Frank Pomeroy, Wife AC360
Now playing
05:55
Pastor's faith stronger after daughter's death
Left to right: Anthony Naiboa, Monica Hoffa, Benjamin Mitchell and Ronald Felton. Tampa homicide victims
Tampa Police Department
Left to right: Anthony Naiboa, Monica Hoffa, Benjamin Mitchell and Ronald Felton. Tampa homicide victims
Now playing
01:21
Tampa killings suspect arrested
CNN HLN
Now playing
00:47
Man to gunman: Shoot at me, not kids
charlottesville gunshot aclu virginia von_00000907.jpg
charlottesville gunshot aclu virginia von_00000907.jpg
Now playing
01:25
Man charged with firing gun at protesters
This undated still image from video provided by WTOV-TV in Steubenville, Ohio, shows Jefferson County, Ohio Judge Joseph Bruzzese Jr. Bruzzese was shot and wounded Monday, Aug. 21, 2017, as he walked toward his county's courthouse in Steubenville, Ohio, and a suspect was killed after a probation officer returned fire, officials said. (WTOV-TV via AP)
WTOV-TV /AP
This undated still image from video provided by WTOV-TV in Steubenville, Ohio, shows Jefferson County, Ohio Judge Joseph Bruzzese Jr. Bruzzese was shot and wounded Monday, Aug. 21, 2017, as he walked toward his county's courthouse in Steubenville, Ohio, and a suspect was killed after a probation officer returned fire, officials said. (WTOV-TV via AP)
Now playing
00:52
Ambushed judge returns fire, suspect dead
FILE- In this Oct. 5, 2016 file photo, Indian spiritual guru who calls himself Saint Dr. Gurmeet Ram Rahim Singh Ji Insan, center, greets followers as he arrives for a press conference ahead of the release of his new movie "MSG, The Warrior Lion Heart," in New Delhi, India. Several cities in north India were under a security lock down Thursday ahead of a verdict in a rape trial involving a controversial and hugely popular spiritual leader. (AP Photo/Tsering Topgyal, File)
Tsering Topgyal/AP
FILE- In this Oct. 5, 2016 file photo, Indian spiritual guru who calls himself Saint Dr. Gurmeet Ram Rahim Singh Ji Insan, center, greets followers as he arrives for a press conference ahead of the release of his new movie "MSG, The Warrior Lion Heart," in New Delhi, India. Several cities in north India were under a security lock down Thursday ahead of a verdict in a rape trial involving a controversial and hugely popular spiritual leader. (AP Photo/Tsering Topgyal, File)
Now playing
01:37
Deadly clashes after guru convicted of rape
Isra Chaker
Now playing
01:22
Death of Muslim teen near mosque investigated
Twitter post captions: Police and ambulances on Hackney/Queensbridge Road, possible acid/petrol attack. Lots of @UberEATS @Deliveroo drivers rallied round
@sarah_cobbold/Twitter
Twitter post captions: Police and ambulances on Hackney/Queensbridge Road, possible acid/petrol attack. Lots of @UberEATS @Deliveroo drivers rallied round
Now playing
01:27
5 acid attacks in 1 night in London
Walla News
Now playing
01:34
Authorities: Teen killed for dating Muslim
KDVR
Now playing
00:49
Veteran killed after saving teens
KATC
Now playing
02:06
Questions linger in Louisiana man's death
Bucks County Sheriff's Office
Now playing
01:16
Two men charged in homicides of missing men

Story highlights

NEW: Man arrested over American woman's death in Florence had met her in nightclub

NEW: Police believe pair had consensual sex at her apartment before she died

NEW: Suspect's DNA was found in Olsen's apartment, and he also had victim's phone

CNN —  

A man has been arrested in connection with the death of Ashley Olsen, a 35-year-old American artist living in Florence, the city’s chief prosecutor told reporters Thursday.

The suspect, Cheikh Tidiane Diaw, was arrested at his home Wednesday night, chief prosecutor Giuseppe Creazzo announced at a press conference.

DNA evidence linked to the suspect was found in a condom and on a cigarette at Olsen’s house, where Diaw’s fingerprints were also found, Creazzo said. Diaw had taken Olsen’s phone and put his SIM card in it, and was using the device when he was arrested, the prosecutor said.

A photograph released by Italian police of suspect Cheikh Tidiane Diaw.
Courtesy Italian State Police
A photograph released by Italian police of suspect Cheikh Tidiane Diaw.

Police believe that Olsen and Diaw, an illegal immigrant from Senegal who was born in 1988, had met at the city’s Montecarla nightclub and left to go back to Olsen’s place together, where they had consensual sex, Creazzo said.

He said Olsen was strangled by something “other than bare hands,” but also had two fractures to her cranium.

Police have established there was no one else present in the room when Olsen died, Creazzo said. Authorities are awaiting the results of toxicology tests.

Florence prosecutor: ‘No one has been excluded’ in death of American

Ashley Olsen and Scout.
Ashley Olsen/Facebook/Ashley Olsen/Facebook
Ashley Olsen and Scout.

Olsen was found dead in her apartment on Saturday, after her boyfriend had been unable to reach her and asked Olsen’s landlord, Claudia Colivicchi, who lived upstairs, to open the apartment for him.

Colivicchi told Italian media outlets that when she opened the door, Olsen was on a bed in a mezzanine loft of the studio apartment.

Olsen’s dog, Scout, who was a regular feature on her Instagram and Facebook feeds, had defecated in multiple places within the apartment, indicating that the well-trained beagle had not been taken for a walk in some time, Colivicchi told media outlets.

Italian media: Ashley Olsen of U.S. may have been strangled with cord or rope

The woman’s friends told investigators they were with Olsen at the Montecarla nightclub in Florence on Thursday night and left her there between 3 a.m. and 4 a.m. Friday, local media reported.

Olsen was originally from Summer Haven, Florida. She was living in Florence, where her father, an architect, works at an art school. Her father was seen with friends outside her building Monday, leaving flowers.

“The police haven’t really said anything yet. My son is waiting for the police to share more,” Olsen’s grandmother, Ann Olsen, told CNN by phone from Florida.

Olsen’s friends told CNN affiliate WJAX in Jacksonville, Florida, that Olsen was “full of life.”

“She never met a person who didn’t like her. … She had the best personality,” Staci Kelly told the station, adding that Olsen loved to travel. “She never really stayed in one spot for too long.”

CNN’s Joshua Berlinger, Michael Pearson, Tim Hume, Dana Ford, Vasco Cotovio, Dave Alsup, Allie Malloy and Hande Atay contributed to this report.