There is drinking and characters are mentioned to have been drunk, but there is no implication of a pattern of alcohol abuse, and being drunk does not inherently make a character an alcoholic
The murder victim had a much younger romantic partner, while no specific ages are mentioned, the age gap seems to be somewhere around a 20 year difference
ep 2: protagonist's sister tells her that their father has had an aneurysm and could have a stroke. ep 3: the father is in the hospital after having had a stroke.