Why were the police unable to catch Jack the Ripper?
The police were unable to catch Jack the Ripper because there had been no serial killers before that day, so the police were shocked and confused. It made it harder that the murders were struck in Whitechapel, which is a maze of alleys and runways there was a lack of lighting facilities at night with gaps. Sadly these places were also deal for brutal attacks to occur, Jack the Ripper murders.
Also the murders were unexpected, so without modern forensic techniques they were unable to make the links that we do today. Instead they had to compare evidence to find possible similarities, for example, footprints, killing techniques, killing pattern. It was hard for the police to find possible similarities because; there were various doctors on the case telling them different opinions on the cuts and bodies.