Darrell Is a Narcotics Detective and While Reading an Electronics

Multiple Choice

Darrell is a narcotics detective and while reading an electronics catalog comes across an ad for a device that promises that it can descramble any mobile phone signal.Darrell orders the device and on his off-duty hours uses it to listen in on a suspected drug dealer's telephone conversations.Later,he seeks a warrant based on these conversations.Are Darrell's actions constitutional?

A) Yes,because he used his own funds to buy the device.
B) Yes,because he only listened in on his off-duty hours.
C) No,because the device was regular police issue.
D) No,because he did not have a warrant to use the device.