A 30-year-old man has been questioned on suspicion of murder after a computer science graduate was found stabbed to death in a car outside her home.
Shehla Baig, 27, of Crawley, West Sussex, was found on 16 November.
Police said the man had been bailed until 17 February, and continued to be detained under the Mental Health Act.
They said a 51-year-old man also arrested on suspicion of murder was no longer being treated as a suspect and had been stood down from bail.
Ms Baig, who was a classroom assistant, was described by her family as "beautiful, charming and loving".
"She brightened our lives and hearts and was adored by all who knew her," a statement said.
She graduated with a degree in computer sciences and married in 2007.
Ms Baig was found in a Volkswagen Passat estate car outside her home in Woodfield Road.
Sussex Police said the victim and the arrested men were known to each other.