Madeleine Smith

 I found a very good video about Madeleine Smith. She was accused of poisoning her former lover in Glasgow in 1857. A jury returned a verdict of 'not proven', a Scottish verdict that meant she was not necessarily innocent but there was not sufficient evidence to convict her.

Dr Bodkin Adams

 Bodkin Adams was a doctor who murdered people in Brighton, England in the 1950s. The not-so-good doctor made a lot of money from his crimes. This is an excellent video about him.

Octogenarian hanged

 On 4 October 1843 an 84 year old man was hanged in Scotland for the murder of his wife. His name was Alan Mair. 

House in Philadelphia

 A frightening case in Philadelphia USA 

A letter from Jack the Ripper

 On 27 September 1888, Central News Agency in London received a letter signed 'Jack the Ripper'. It was probably a hoax. It's unlikely it was from the murderer but it gave him his name. It's almost certain now that we will never know the killer's real name, too much time has passed and things like the victim's clothes that might contain evidence were destroyed long ago because at that time they didn't see any point in keeping it. Obviously, they had no concept of DNA or other modern forensic techniques.

The first murderer caught by DNA evidence

 On 19 September 1987 Colin Pitchfork was arrested at his home in Leicestershire, England. He was the first murderer to be caught by DNA evidence. He was sentenced to life imprisonment in January 1988.

Beheaded in Denmark

  In Denmark beheading with an axe was the traditional method of execution. The last person in Denmark to be beheaded with an axe was Jens Nielsen in 1892. The guillotine was never used in Denmark but it was used just once in Sweden, in 1910.