A shocked Brooklyn tenant fatally stabbed a violent ex-con burglar with the intruder’s own knife as he struggled to disarm the stranger who had invaded his apartment, according to sources and a report.
The 45-year-old tenant appeared to have acted in self-defense when he allegedly knifed 34-year-old Dan Costume in the leg and back during a Friday night scuffle inside his third-floor apartment on Avenue D near East 31st Street in Flatbush, law enforcement sources said.
Costume — who has been on parole since 2024 after serving prison time for attempted burglary, according to public records — had first stabbed the tenant in the neck, cops said…