When we read about murders or homicides, in most of the cases, there are motives for the incident. In many cases, these are revenge killings, or done in the heat of the moment, and when the person ends up in court, there is a motive. In some cases, where the reason is reason enough (such as in self-defence or to avenge some utter humiliation), people can think that the motive is something that may get convince that there was no option other than the killing, and the murder punishment can be reduced to that extent. However, there are cases where the killing is so random, or when there is no motive for the murder, and society cannot determine why the crime occurred. In such cases, the punishment is even more severe, with the trial typically ending in a very severe penalty (link to article):
A Dutch engineer accused of murdering the woman who lived next door in southwest England strangled her and then researched how long it would take a body to decompose, his trial heard on Monday.
Vincent Tabak, 33, admits manslaughter but denies murdering 25-year-old landscape architect Jo Yeates, whose body was discovered hidden under leaves and snow next to a country road near Bristol on December 25 last year.
Prosecutor Nigel Lickley told Bristol Crown court that Tabak attacked the woman in her flat, bundled her body into his car, dumped it and then sent a text message to his girlfriend saying he was "bored".
Yeates had gone missing on December 17 after going for a drink with colleagues and buying a pizza from a supermarket on the way home.