I was a one-man company till I hired an employee (an engineer on $90k/yr). His work was fine for about a month and then his output and the quality of his work went down. He admitted to a long history of depression, feelings of inadequacy, and suicidal tendencies. He admitted that recently his mind could not focus on his work for days on end. Two weeks before a major deadline, he failed to show for work and it transpired he had been admitted to hospital for depression and threats of suicide. When he returned to work, I kept him off difficult work for a few weeks. When he seemed OK, I resumed my normal expectations. About a week later and two days before our next major deadline was due, I criticized his work and he walked out of the office without saying a word and hasn't come back since (nearly 2 weeks later).
I presumed he had quit but he is now emailing me, complaining about me berating him and scoffing at his work. He also says that he consulted a doctor (9 days after walking out of the office) and that he is required to attend a hospital each day as an out-patient.
It seems to me he is trying to establish either (A) that he is on sick leave or (B) that I constructively dismissed him by making remarks about his work that he found insulting. From my point of view, I think he quit his job when he walked out. What isthe legal position?
We are an in Texas and it is an at-will job.