A search warrant was executed at two addresses in Hawke's Bay on Wednesday in search of a second person of interest, one in Hastings and another in Bridge Pa.
"If you are found to be harbouring or assisting this individual, you are at risk of being charged yourself," a police spokesperson said.
The man of interest was not located at either address and police believe he is receiving help or information from others.
"We urge people to come forward and assist us with our inquiries into the death of Darcy Strickland, a much-loved son, brother, nephew and friend," police said.
Information can be given to police by calling 105 and quoting file number 221014/5396.
Details can also be shared anonymously through Crime Stoppers on 0800 555 111.