He told the Standard they expect to press charges of murder as soon as they are through with their investigations.
“Definitely we will take some people to court. It is a matter of time,” said Kamwende.
Police said Ms Fonseca, who arrived in Nairobi on July 15, had not been given a police escort nor was her residence guarded by police.
The acting ambassador had been staying at a hotel and had only moved to the embassy’s residence in Runda two days before she was killed on Thursday night.
Before her body was discovered in her bedroom, she had held a party at the residence in which several people are said to have attended on Thursday night.
The body was discovered on Friday by security after she failed to wake up for duties as usual.