The disappearance of Claudia Lawrence is a case I keep coming back to just to see if there have been any updates.

Claudia was a chef at the University of York's Goodricke College. On March 18 2009, she arrived at her workplace at 5:30 AM and completed her shift at 2:00 PM. On her way home, she was recorded on CCTV as she passed by some stores in Melrosegate in York. That same evening, she spoke to her parents on the phone as well as sent a text message to her friend at 8:23 PM. She seemed to be in good spirits and she mentioned that she would have to get up early the next day in order to walk to work, because her car had broken down recently. There was nothing that indicated that she was worried about something or planning to do anything other than attending work on March 19. This would turn out to be the last anyone is confirmed to have seen or heard from her.
On March 19, she failed to report for duty despite being scheduled to start work at 6:00 AM. Her manager tried calling her, but the call was directed to voice mail. Later that same day, she was supposed to meet up with her best friend Suzy at a local pub, the Nag's head, but she didn't show up at the meetup and didn't respond when her friend tried contacting her by phone.
The next day, Suzy still couldn't get through to her, so she contacted Claudia's landlord and Claudia's father Peter. Peter called Claudia's workplace and found out she had failed to report for duty on both March 19 and March 20. He then entered her house with Claudia's landlord. Her house was in an orderly state, with no signs of a break-in or a struggle. Her purse, credit cards and passport were still at the house. The only things that were missing were her backpack, chef's uniform, a set of hair straighteners and her Samsung phone. Everything indicated that she'd left the house at around 5:00 AM to go to work as usual on March 19. Later on March 20, she was reported missing to the Yorkshire police.
To this day, what happened to her is a mystery.
Some interesting nuggets of information:
a) There were two independent eyewitnesses who quickly came forward and reported seeing an unknown man and a woman who might have been Claudia. The first sighting took place at around 5:35 AM on Melrosegate bridge, not far away from where Claudia was recorded on CCTV the day before. The witness saw a woman with mousy brown hair talking to a skinny man, who was wearing a dark hoodie and cargo pants and smoking a cigarette with his left hand. 35 minutes later, at around 6:10 AM, the second eyewitness saw a man in a dark hoodie and a woman arguing next to a parked vehicle on University Road. The man in the dark hoodie has never been identified.
b) Claudia's phone remained on until 12:10 PM on March 19, when it was deliberately switched off. When her manager tried calling her at 10:00 AM, her phone connected to a mast near York university. This suggests that her phone never left the area. Her phone, the backpack she'd carry it in and her other items she'd carry with her to work have never been found.
c) In 2015, the Yorkshire police released CCTV footage showing an unknown man walking around the side of Claudia's house and then entering the alley behind her house, first on March 18 2009 at 7:15 PM and then on March 19 2009 at 5:07 AM (some people say the time on the CCTV footage isn't correct and that it was actually closer to 5:50 AM). At one point in the footage, he's seen coming to a halt in order to avoid being seen by another person passing by. This man has also never been identified.
d) There have been attempts to connect serial killers operating in the area to this case. Notably, serial killer Christopher Halliwell has been linked to the case. A couple of things that point to him potentially being involved are him being familiar with the York area and the fact that he's a left-handed smoker. The date on which Claudia Lawrence was likely abducted, March 19, also holds special significance to him (one of his known murder victims, Sian O'Callaghan, was murdered on this date) because that's when an ex-girlfriend broke up with him in the 80s.
e) Early on in the investigation, it was reported that she'd engaged in a number of affairs with married men. The police superintendent even called her love life "complex and mysterious" which made the Britbong tabloid press go nuts. If the person who abducted her is someone she knew (which is probable) and someone else knows something, it wouldn't surprise me if they clammed up partially because of the drama surrounding the case. It's not unlikely that someone in the community knows what happened to Claudia.
I would really like to see this case be solved one day. It's unfortunate that her father Peter passed away in 2021 without finding out what happened to her.
Here's a compilation of all of the CCTV footage that has been released: