Here is a timeline 11alive.com has put together:
Feb. 5, 2018: Tim Cunningham finds out that he will not be promoted to branch manager at the CDC.
Feb, 8 and Feb. 9: Cunningham calls out sick for work
[In a different article, the neighbor is quoted as saying the following exchange took place on Sat., Feb. 10th]:
Feb. 11: Cunningham tells a neighbor to tell his wife to delete his (Cunningham's) phone number from her cell phone.
Before 7:30 a.m.: Cunningham meets with his supervisor at the CDC Chamblee office, who explains to him why he will not be receiving a promotion.
7:30 a.m.: Cunningham tells co-workers he is feeling sick and will finish his work at home.
9:12 a.m.: Cunningham call his mother. She does not answer and Cunningham does not leave a voicemail.
[I believe the following section contains an error: According to other reports, the relative did not enter the home; they only observed it appeared empty and that there were two windows that were left open. It was actually Tims parents who went inside using a spare key and found his various belongings there]:
Date/time unknown: After not hearing from their son, Cunningham's parents ask a family member to use a spare key to check on him at his house. The relative reports back that Cunningham was not home, but his cell phone and car keys were in the house.
7:30 a.m.: Cunningham's parents arrive at his Atlanta home after driving through the night from Maryland. They find the home empty, with two windows -- one in a bathroom and one in a laundry room -- open. Cunningham's dog, Beau, is at the house.
9:30 a.m.: Cunningham's parents report him missing.
Also, here is a list of personal items that were found inside the home, as stated by LE:
The most unusual factor in this case is that every single belonging that we are aware of was located in the residence. [Atlanta Police Major Michael] OConnor said. So his keys, his cellphone, debit card, credit cards, wallet, all of his identification, passports. Anything you can think of, weve been able to locate. None of those items are missing.
I dont seem to be able to find any article that mentions his work cell phone. Has it been confirmed he had one?