Overview
- Portuguese police detained the 19-year-old at a Lisbon hotel on Thursday under a European arrest warrant.
- Authorities say he is suspected of fatally stabbing his father, the father's wife, and her daughter on São Vicente during the night to Tuesday, 23 December.
- Investigators report he left Cape Verde that day and traveled to Portugal before being located.
- He is to appear before an examining judge who will decide on possible pre-trial detention.
- Police say the investigation continues with cooperation among Portugal, Germany, and Cape Verde, and the motive remains unclear.