"I finished an unattended. Natural causes. Guy was a hundred and six, and his second ticker conked on him in his sleep. Good way to go if you gotta"
What is a second ticker? A clock??? Does it mean A clock hit a man to death when he was sleeping??
The human heart is often referred to as a ticker, one's ticker, one's life clock; when it stops beating, one's life is over, one's time is up.
The first ticker is one's heart, the second ticker is another name for a pacemaker, which is an artificial device that stimulates the heart muscles.
',...and his second ticker conked (out) on him' means, his pacemaker stoppped working. :(
'hanging low, and long' is ambiguous--given the lack of context. It could mean, though, that the officer is hiding out or taking a break from duty:
A: Hanging low? (i.e., taking a break from duty; keeping out of sight)
B: Hanging low, and long. (i.e., Yes, and for a while)
With regards to:
A: How's it hanging?
B: Fine, OK, Pretty good, etc.
"It" refers to the male genitals, specifically the penis; "hanging" refers to its state/position of rest. Its position could be one of comfort or discomfort and hence 'How's it hanging?" means, "How are you (doing)?"
I dare say, given the question, "Hanging low?", that the officer's reply is in reference to the position (i.e., low) and size (long) of his penis.