Lock, Stock and Peril - Lindenshaw Mysteries, #6

They may be locked down but this case isn't. Lockdown is stressful enough for Chief Inspector Robin Bright. Then a murder makes this strange time even stranger. In one of Kinechester's most upmarket areas, the body of Ellen, a brilliant but enigmatic recluse, has lain undiscovered for days. Pinning down the time-and date-of death will be difficult, but finding a killer during unprecedented times could prove impossible.
Adam Matthew's focus on his pupils is shaken when a teaching assistant reveals his godmother has been murdered. Keen to avoid involvement, Adam does his best to maintain a distance from his husband, Robin's, case, but when it keeps creeping up, Adam lends his incisive mind to the clues again. Between Robin trying to understand the complex victim and picking his way through a mess of facts, half truths, and downright lies from witnesses desperate to cover up their own rule-breaking, he realises this could be the cold case that stains his career and forever haunts a community.
And when it looks like the virus has struck Adam, Robin's torn between duty and love.