Aaron Kosminski was a Polish-Jewish barber who lived in Victorian England. He is best known for being one of the main suspects in the infamous "Jack the Ripper" case from 1888, which took place in London's East End.

Key points about Aaron Kosminski:

1. Born: 1865 in Kowal, Kingdom of Poland

2. Immigrated to England with his family as a child

3. Worked as a barber in London

4. Suspected of being Jack the Ripper due to several factors:

- His residence was near the crime scenes

- He had a history of mental health issues

- He reportedly had a hatred of women and would attack them with scissors

- Hair consistent with that found on a victim was discovered

5. Was examined by police during the investigation but not charged

6. Lived in a workhouse and later in an asylum due to mental health issues

7. Died in 1919 at the age of 54 in an asylum in London

The case against Kosminski remains circumstantial, and he has never been definitively proven to be Jack the Ripper. However, he remains one of the more credible suspects in this unsolved mystery of Victorian-era crime.